• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    selective attenuation ear protector. the present invention relates to a selective attenuation ear protector (300). in an exemplary embodiment, a selective attenuation earplug includes a switch (330) adjustable between a first position and a second position, and the switch includes at least one cantilevered spring arm (333, 334).
    公开号:BR112015015729B1
    申请号:R112015015729-7
    申请日:2013-12-19
    公开日:2021-08-03
    发明作者:Jacob H. Ely
    申请人:3M Innovative Properties Company；
    IPC主号:
    专利说明:

    technical field
    [001] The present invention relates to a selective attenuation earplug having a switch, in particular a selective attenuation earplug having a switch comprising one or more cantilevered spring arms. Background
    [002]The use of hearing protection and noise attenuation devices are known, and several types of devices have been considered. Such devices include earmuffs and semi-ear devices partially or completely constructed of foam or rubber materials that are inserted into or placed over the wearer's ear canal to physically obstruct the passage of sound waves into the inner ear.
    [003]Ambient sounds are typically composed of a mixture of various frequencies of sound waves having different intensities. Selective attenuation earplugs can be provided to allow a user to select from multiple performance settings. For example, a low sound attenuation mode can be selected to attenuate impulse noise, such as a gunshot, while allowing voices or warning signals to pass through the user's ear canal. A high attenuation mode can be selected to attenuate all sounds, regardless of intensity. Various selective attenuation earplugs are available, such as the COMBAT ARMS earplugs available from 3M Co. of St. Paul, Minnesota, USA. For example, the dual-ended COMBAT ARMS includes first and second ends that can be at least partially inserted into the user's ear canal. Inserting a first end can provide high impulse noise attenuation, while inserting a second end can provide maximum attenuation. COMBAT ARMS single-ended earmuffs include an oscillator cap, for example, which can be switched between an open or closed position. When in an open position, sound can enter the earplug's sound channel and pass through a filter that restricts high impulse noise before entering the ear canal. When the oscillator cover is closed, maximum attenuation can be provided for sound at any level. summary
    [004] In an exemplary embodiment, the selective attenuation earplug is provided to include a tip having a first end and a second end, a body attached to the tip, an acoustic channel extending from a first end. tip end to an opening in the body and an adjustable switch between a first position where the opening is at least partially open to allow sound to pass through the opening and the acoustic channel and a second position where the opening is blocked. The switch comprises a first cantilever spring arm including a shape that interacts with a feature on a surface of the body, and the shape is forced against the feature on the surface of the body to hold the switch in the first or second position. In some embodiments, the first cantilever spring arm includes a protrusion that interacts with a first recess on the body surface to hold the switch in the first position and interacts with a second recess on the body surface to hold the switch in the second position. .
    [005] In another exemplary embodiment, a selective attenuation earplug is provided that includes a sound attenuation tip having a first end and a second end, a body coupled to the sound attenuation tip, an acoustic channel extending from a first end of the sound attenuating tip to an opening in the body, and a switch comprising a first cantilever spring arm having a sealing block, the switch adjustable between a first position where the opening is at least partially open to allow sound to pass through the opening and the acoustic channel and a second position where the opening is blocked by the sealing block. The first cantilever spring arm forces the seal block toward the opening in a first position and toward a body surface in a second position.
    [006] In another embodiment, a hearing protection device is provided including first and second selective attenuation earplugs joined by a cord, each of the first and second selective attenuation earplugs comprising a tip that has a first end and a second end, a body attached to the tip, an acoustic channel extending from a first end of the tip to an opening in the body, and a switch adjustable between a first position where the opening is at least partially open to allow sound to pass through the opening and the acoustic channel and a second position where the opening is blocked. The switch comprises a first cantilever spring arm including a shape that interacts with a feature on a body surface, and the shape is forced against the feature on the body surface to hold the switch in the first or second position.
    [007] The above summary of the present invention is not intended to describe each of the disclosed embodiments or all implementations of the present invention. The figures and the detailed description below, more particularly exemplify the illustrative modalities. Brief description of the drawings
    [008] The present invention will be further explained with reference to the accompanying figures, in which similar structures are referred to by similar numerals in all the various views and in which:
    [009] Figure 1 is a perspective view of the selective attenuation ear protector, according to an exemplary embodiment of the present invention.
    [010] Figure 2 is an exploded cross-sectional view of the selective attenuation ear protector, according to an exemplary embodiment of the present invention.
    [011] Figure 3a is a cross-sectional view of the selective attenuation ear protector, according to an exemplary embodiment of the present invention in which a switch is in a first position.
    [012] Figure 3b is a cross-sectional view of the selective attenuation ear protector, according to an exemplary embodiment of the present invention in which a switch is in a second position.
    [013] Figure 4 is a perspective view of the selective attenuation ear protector, according to an exemplary embodiment of the present invention including a retention device.
    [014] Figure 5 provides a perspective view of a hearing protection device, according to the present invention.
    [015]Although the figures identified above present several modalities of the subject revealed, other modalities are also contemplated. In all cases, this disclosure presents the matter disclosed by way of representation and not limitation. It should be understood that various other modifications and modalities may be devised by those skilled in the art that fall within the scope and spirit of the principles of this disclosure. Detailed Description
    [016]The present disclosure provides a selective attenuation earplug that can be switched between multiple operating modes to adjust the performance of the earplug. The selective attenuation earplug provides at least a first mode that can allow sound that has a specific frequency or intensity to pass into the wearer's ear canal with little or no attenuation while attenuating sounds in a frequency range or different intensity, and a second mode that provides a maximum level of attenuation over a certain frequency range and/or intensity. The selective capability of the ear protector allows a user to select the degree of sound attenuation desired depending on the current environment surrounding the user. A selective attenuation mode can be selected when a user wants to hear intelligible speech or warning signals in a noisy environment, for example, while still being protected from dangerous noise. Such a mode may be particularly desirable when the noisy environment includes gunfire, loud industrial noise, and the like. A maximum attenuation mode can be selected to minimize the entry of most sounds across a range of frequencies into the ear canal, regardless of loudness.
    [017] Referring to Figure 1, an exemplary selective attenuation earplug 100, in accordance with the present disclosure, includes a tip 110, as a sound attenuation tip, having a first end 111 and a second end 112. Earplug 100 further includes a body 120 secured to tip 110 and an acoustic channel (not shown) extending from a first end of tip 110 to an opening in the body. Switch 130 is adjustable between a first position where sound can pass through the opening and the acoustic channel and a second position where the opening is blocked. As will be further described in the present invention, an exemplary switch 130 includes one or more cantilevered spring arms that interact with one or more features of body 120 to hold the switch in a desired position.
    [018] Figure 2 provides an exploded sectional view of an exemplary embodiment of selective attenuation earplug 200. Earplug 200 includes a sound attenuating tip 210 having a first end 211 and a second end 212, a body 220, a switch 230, a coupler 240 and one or more filters 250.
    [019]The 210 tip is made of soft, pliable foam, rubber, polymer or other suitable material that can be comfortably positioned in the user's ear canal. In an exemplary embodiment, the tip 210 at least partially conforms to the wearer's ear canal to provide a sufficient acoustic or pneumatic seal against the walls of the ear canal. In various exemplary embodiments, tip 210 is made of a styrene-ethylene-butylene-styrene (SEBS) thermoplastic elastomer (TPE) such as C-FLEX available from Consolidated Polymer Technologies, Inc. of Clearwater, Florida, USA. Other suitable materials include silicone, polyurethane foam or other suitable materials as known in the art.
    [020] In an exemplary embodiment, tip 210 includes a plurality of flanges 213 that can flex when a portion of tip 210 is positioned in the ear canal. In various other exemplary embodiments, tip 210 may be bullet-shaped, bell-shaped, cone-shaped, mushroom-shaped, or otherwise shaped to provide a desired fit or to suit a specific application.
    [021] Exemplary earplug 200 additionally includes a frame 220 having a cavity 225, an opening 222, and a curved inner surface 223. The switch 230 is positioned partially within the body 220 and can be switched between two or more positions.
    [022]Tip 210 can be attached to body 220 directly or indirectly. In an exemplary embodiment illustrated in Figure 2, tip 210 and body 220 include cavities 215 and 225, respectively, to accommodate first and second ends 241 and 242 of a connector such as coupler 240. Cavities 215 and 225 and first and second ends 241 and 242 of coupler 240 may be sized so that an interference fit is obtained and coupler 240 frictionally retains tip 210 and body 220 in coupler 240. In various exemplary embodiments, the coupler 240 and/or tip 210 and body 220 include associated features 243 such as barbs, ribs, projections, and/or complementary features that serve to secure tip 210 or body 220 to coupler 240.
    [023] In an exemplary embodiment, tip 210 and/or body 220 are detachably coupled to coupler 240 so that tip 210 and body 220 can be disassembled from coupler 240 to replace tip 210 or other components. Tip 210, for example, can be replaced due to wear, dirt or to select a size or style to provide a desired fit or functionality. In various other exemplary embodiments, tip 210 and/or body 220 may be adhesively bonded, integrally formed, or otherwise permanently attached to coupler 240. In alternative exemplary embodiments, tip 210 and body 220 include respective complementary shapes that allow tip 210 is attached directly to body 220 without an independent coupler. For example, an exemplary body may include a projection configured to be accommodated in a cavity of tip 210 or vice versa, or tip 210 and body 220 may be secured as a result of being integrally formed in an injection molding process, for example .
    [024]When assembled, the body 220 provides sufficient rigidity that the earplug 200 can be positioned for use at least partially on the user's ear who pushes the tip 210 into the ear canal with adequate force. That is, a body 220 that has sufficient rigidity or hardness combined with a suitable tip 210 allows the earplug 200 to be positioned for use at least partially on the wearer's ear without the need to first compress or “roll” the tip 210. Direct insertion without the need to first compress or “roll” tip 210, for example, promotes hygiene by limiting contact with tip 210 prior to placement in the ear.
    [025]Body 220 is produced from a relatively rigid polymer or other suitable material that has sufficient rigidity or hardness. In an exemplary embodiment, the body 220 is produced from a polyamide (PA) such as ZYTEL available from DuPont. Other suitable materials include poly(ethylene terephthalate) (PET), poly(methylene oxide) (POM) or other suitable materials as known in the art. In some exemplary embodiments, body 220 and switch 230 are made of a similar or identical material. In other exemplary embodiments, body 220 is produced from a PA while commutator 230 is produced from a POM such as DELRIN available from DuPont.
    [026] In an exemplary embodiment, body 220 includes a recess, loop, opening or other suitable feature, such as cavity 228, to secure a cord 270. Cord 270 includes first and second ends that can be attached to the first and second protectors by ear, respectively. In an exemplary embodiment, cord 270 features a non-gloss or matte finish to minimize light reflection.
    [027] The earplug 200 includes a passage, such as an acoustic channel 214, which extends from the opening 222 of the body 220 to the first end 211 of the tip 210. The acoustic channel 214 thus passes through the coupler 240, if it is. gift. Acoustic channel 214 provides an air passage between opening 222 and the first end of tip 210. Acoustic channel 214 thereby allows sound waves from an external environment to enter acoustic channel 214 through opening 222 and travel through the opening. the user's ear canal when the earplug 200 is positioned for use and the switch 220 is positioned so that the opening 222 is at least partially unobstructed. In various exemplary embodiments, channel 214 can have a uniform diameter or a different diameter along its length, can curve, and/or can be of various regular or irregular shapes and sizes.
    [028] The sound traveling through channel 214 passes through one or more acoustic filters 250. In an exemplary modality, the one or more acoustic filters 250 may include one or more relatively narrow apertures that selectively allow the passage of waves sound. For example, the one or more filters 250 can be configured with a narrow aperture that increases sound attenuation above a predetermined intensity. In an exemplary embodiment, one or more filters 250 may include one or more filters as described in US Patent Nos. 6,148,821, 6,070,693, 6,068,079 or 5,936,208 e.g. reference in its entirety.
    [029] The exemplifying switch 220 is adjustable between a first position where the opening is at least partially open to allow sound to pass through the opening 222 and the acoustic channel and a second position where the opening 222 is blocked. An exemplary earplug 200 includes a switch having one or more integrated cantilever spring arms that are biased against a body surface and interact with one or more features on a body surface to hold the switch in the first or second position. . Referring to Figure 2, switch 230 includes first and second cantilever spring arms 231 and 232 and first and second activation levers 233 and 234. Cantilever spring arms 231 and 232 extend in a direction generally in the direction opposite first and second activation levers 233 and 234. Cantilever spring arms 231 and 232 are generally arcuate or have a desired curvature when mounted with body 220. In some embodiments, one or both of the cantilever spring arms 231 and 232 may have little or no curvature before being mounted to the body 220 and may curve due to contact with the surface 223 or other features of the body 220 or earmuff 200. In other embodiments, the cantilever spring arms 231 and 232 have an initial curvature and are forced to have a greater curvature when mounting with the body 220 due to contact with the surface 223 or other features of the body 220 or protector 200. One or both of the cantilevered spring arms 231 and 232 act as a spring and are forced against the surface 223 due to the natural tendency of the cantilevered spring arms 231 and 232 to return to an original configuration. Only slight deformation of the cantilevered spring arms 231 and 232 may be necessary in mounting the commutator 230 with the body 220 to obtain the desired effect. That is, the deformation or bending of the cantilevered spring arms 231 and 232 when assembled with the body 220 will generally remain in the elastic regime.
    [030] Figures 3a and 3b illustrate an exemplary ear protector 300 having a tip 310, a body 320 and a switch 330 in the first position (Figure 3a) and a second position (Figure 3b). Earplug 300 includes a channel 314 that extends from opening 322 of body 320 to first end 311 of tip 310. When switch 330 is positioned so that opening 322 is at least partially unobstructed, channel 314 allows sound waves enter opening 322 from an external environment to travel to the user's ear canal.
    [031] Switch 330 includes a first cantilevered spring arm 331 having a shape like cam boss or protrusion 335, which interacts with one or more features such as first and second recesses 324 and 325 on surface 323 of body 320 to hold switch 330 in a first or second position, respectively. In a first position illustrated in Figure 3a, protrusion 335 is positioned in recess 324. As described above with reference to earplug 200, at least a portion of the end of the first cantilever spring arm 331 is biased toward surface 323 and recess 324 by a spring force resulting from the flexing of the first cantilever spring arm 331. The spring force may result from the original curvature of the first cantilever spring arm 331 and/or flexion or deformation of the first cantilever spring arm of cantilever 331 when assembled with body 320. In this way, protrusion 335 is maintained in recess 324.
    [032] In a first position illustrated in Figure 3a, the opening 322 is at least partially unobstructed so that sound waves can enter the opening from the external environment. Sound waves may travel into body 320 through openings or ports in body 320, such as port 327, or one or more openings or ports 337 in switch 330, or through openings between body 320 and switch 330. sound waves entering aperture 322 encounter one or more filters 350 and may be attenuated based on the performance of filter 350. In an exemplary embodiment, one or more filters 350 include two or more small apertures. Sound waves passing through filter 250 are selectively attenuated so that high intensity sounds are attenuated, while sounds below a specific intensity or within a desired frequency range pass with little or no attenuation.
    [033] In a second position illustrated in Figure 3b, opening 322 is blocked by sealing block 336 adjacent to one end of second cantilever spring arm 332. Similar to first cantilever spring arm 331 described above, the block is The seal of the second cantilever spring arm 332 is forced toward the opening 322 and/or surface 323 of the body 320 by a spring force resulting from the flexion of the second cantilever spring arm 332. The spring force may result from the original curvature of the second cantilever spring arm 332 and/or bending or deformation of the second cantilever spring arm 332 when assembled with the body 320. In this way, the seal block 336 is pushed against a perimeter of the opening 322 and blocks the opening 322 to prevent external sound waves from entering sound channel 314.
    [034] The configuration of a seal block adjacent to one end of the cantilever spring arm 332 provides several advantages in locking the opening 322. When moving between a first position and a second position, the seal block 336 moves through opening 322, as opposed to being inserted into or removed from opening 322, for example. The spring force provided by the second cantilever spring arm 332, for example, forces the sealing block 336 against the opening 322 and an opening perimeter 322 and ensures a proper seal so that the opening 322 is completely or almost completely blocked . Due to the spring force of the second cantilever spring arm 332, a proper seal can be maintained even if the seal block 336, body 320, or other components of earmuff 300 change shape or erode due to repeat wear. of the operation of the switch 330. Additionally, certain manufacturing tolerances need not be particularly accurate because the seal block 336 does not need to be precisely positioned to create an interference fit, for example, as it might be necessary if it were inserted into the opening 322 as a plug.
    [035] In an exemplary embodiment, the second cantilever spring arm 332 includes a pivot portion 339 adjacent to the seal block 336. The pivot portion 339 allows for the pivoting of the seal block 336 so that the seal block seal 336 may pivot or pivot to provide a better seal at opening 322. In various exemplary embodiments, pivot portion 339 may include a portion or area of second cantilever spring arm 332 having a reduced diameter or thickness, or may include a portion. in step. In some exemplary embodiments, the hinge portion 339 provides additional shifting force to urge the seal block 336 toward the opening 322 to ensure a proper seal.
    [036] The switch 330 can be switched between a first position, as shown in Figure 3a, and a second position, as shown in Figure 3b, by applying the appropriate force to the first activation lever 333 or second activation lever 334. applying an adequate force to the first activation lever 333 when the switch 330 is in a first position results in the first cantilever spring arm 331 flexing as the protrusion 335 slides out of the first recess 324. The protrusion 335 and/ or seal block 336 follows a generally arcuate path as switch 330 rotates from a first position to a second position where protrusion 335 reaches second recess 325. Spring force of first cantilever spring arm 331 forces the protrusion 335 into second recess 325 to hold switch 330 in a second position illustrated in Figure 3b. Switch 330 is thereby held in a second position until adequate force is applied to second activation lever 334 to shift switch 330 to a first position. A stop may be provided to prevent the switch 330 from over-rotating. In an exemplary embodiment, the first and second recesses 324 and 325 are positioned so that when the protrusion 335 is held in the first or second recess one of the first or the second activation levers 333, 334 are in close proximity to an edge of body 320 so that further rotation of switch 330 is limited or prevented.
    [037]In an exemplary modality, an indication is provided to the user when the earplug is switched between a first position and a second position. For example, a switch between a first position can provide an audible indication such as a click or click. The first and second audible indications may be provided when switch 330 is toggled from a first position to a second position and from a second position to a first position, respectively. The first and second audible indications may be similar or may be dissimilar so as to provide an indication that the switch is in a specific position. In various other indications, a tactile indication may be provided when the switch 330 is toggled to a first or second position, to provide an indication to the user that the switch is in a specific position.
    [038] When alternated between the first and second positions, the switch 330 and the seal block 336 rotate around an axis that is not parallel to a longitudinal axis of the tip 310. In the exemplary embodiment of Figures 3a and 3b, the switch 330 rotates about an axis R that is perpendicular to a longitudinal axis L of tip 310. A switch rotating about an axis perpendicular to a longitudinal axis of tip 310 is believed to provide ergonomic advantages that allow for easy operation of the tip. switch 330 while earplug 300 is positioned on the user's ear. Additionally, such an operation allows the first and second activation levers 333 and 334 to extend on either side of the axis of rotation to facilitate operation of the switch 330. For example, the first and second activation levers 333 and 334 are relatively large they can allow easy operation of the switch 330 and can allow operation even when the user is wearing gloves, for example. In various exemplary embodiments, the outer edges 333a and 334a of the first and second activation levers 333 and 334 may extend distances R1 and R2, respectively, from a midpoint M of switch 330 between approximately 4mm and 20mm, 6mm and 16mm or between approximately 8 and 12mm.
    [039] In some embodiments, tip 310 and body 320 share a longitudinal axis L. In various other embodiments, body 320, coupler 340, or other portion of earplug 300 may be curved or angled, for example, from so that at least a portion of body 320 of coupler 340 or other portion of earplug 300 has a second longitudinal axis (not shown) that is different or angled with respect to longitudinal axis L. In various exemplary embodiments, the axis of rotation R is similarly not parallel to the second longitudinal axis.
    [040] Figure 4 illustrates an exemplary earplug 400 similar to the example earplugs 100, 200, and 300 described above and including a retainer 470. 400 earplug additional in the user's ear. Earguard 400 is securely held in position by interference between tip 410 and the wearer's ear canal and friction between retainer 470 and the shell or other portions of the wearer's ear.
    [041] In an exemplary embodiment, retainer 470 is secured to body 420 via an opening or loop 471 through which a portion of body 420 passes. Retainer 470 can be secured to the body by sliding retainer 470 into or out of body 420 when tip 410 is not secured to body 420. When tip 410 is secured to body 420, removal of retainer 470 is prevented. In some embodiments, retainer 470 can rotate and/or slide with respect to body 420 or tip 410. In this way, the position of retainer 470 can be adjusted to provide a comfortable fit for a range of users.
    [042] As described above with reference to earplug 300, switch 430 rotates about an axis R that is not parallel to the longitudinal axis L of tip 410 when switch 430 is toggled between a first and second position. When toggled between the first and second positions, the switch 430 and seal block (not shown) rotate about an axis that is not parallel to a longitudinal axis of the tip 410. In the exemplary embodiment of Figure 4, the switch 430 rotates about an axis R that is perpendicular to a longitudinal axis L of tip 410. A commutator that rotates about an axis perpendicular to a longitudinal axis of tip 410 is believed to provide ergonomic advantages enabling easy operation of the switch 430 while earplug 400 is placed on the user's ear. Additionally, such an operation allows the first and second activation levers 433 and 434 to extend on either side of the axis of rotation to facilitate operation of the switch 430.
    [043] Figure 5 provides a perspective view of a hearing protection device 500 according to the present invention. Hearing protection device 500 includes first and second selective attenuation earplugs 501 and 502 having the features and characteristics as described here. The first and second selective attenuation earplugs 501 and 502 are joined by a cord 510 having first and second ends 511, 512.
    [044] The present invention has been described with reference to its various modalities. The aforementioned detailed description has been provided for clarity of understanding only. No unnecessary limitations should be inferred from them. It will be evident to those skilled in the art that many changes can be made in the described embodiments without departing from the scope of the invention. Thus, the scope of the present invention is not to be limited to the exact details described herein, but rather by the language of the claims and their equivalent structures. Any feature or feature described with respect to any of the above embodiments may be incorporated individually or in combination with any other feature or feature, and are presented in the order and combinations above for clarity only.
    权利要求:
    Claims (5)
    [0001]
    1. Selective attenuation earplug (100, 200, 300, 400, 500), comprising: a sound attenuating tip (110, 210, 310, 410) having a first end (111, 211, 311, 411, 511) and a second end (112, 212, 512); a body (120, 220, 320, 420) coupled to the sound attenuating tip (110, 210, 310, 410); an acoustic channel (214) extending from the first end (111, 211, 311, 411, 511) of the sound attenuating tip (110, 210, 310, 410) to an opening (222, 322) of the body (120 , 220, 320, 420); and a switch (130, 230, 330, 430) comprising a cantilevered spring arm (231, 331) having a sealing block (336), the switch (130, 230, 330, 430) adjustable between a first position in that the opening (222, 322) is at least partially open to allow sound to pass through the opening (222, 322) and the acoustic channel (214) and a second position where the opening (222, 322) is blocked by the sealing block (336); CHARACTERIZED by the fact that the cantilevered spring arm (231, 331) forces the seal block (336) toward the opening (222, 322) in the second position and toward a surface of the body (120, 220, 320 , 420) in the first position; and wherein the seal block (336) moves through the opening (222, 322) when switched between the first position and the second position.
    [0002]
    2. Selective attenuation ear protector (100, 200, 300, 400, 500), according to claim 1, CHARACTERIZED by the fact that it further comprises an additional cantilever spring arm (231,331) that includes a shape which interacts with a feature on a surface of the body (120, 220, 320, 420), and the shape is forced against the feature on the surface of the body (120, 220, 320, 420) to hold the switch (130, 230 , 330, 430) in the first position or in the second position.
    [0003]
    3. Selective attenuation ear protector (100, 200, 300, 400, 500), according to claim 1, CHARACTERIZED by the fact that the cantilever spring arm (231, 331) is curved when the switch (130 , 230, 330, 430) is in the first position or in the second position.
    [0004]
    4. Selective attenuation ear protector (100, 200, 300, 400, 500), according to claim 1, CHARACTERIZED by the fact that the switch (130, 230, 330, 430) rotates around an axis that it is not parallel to a longitudinal axis of the sound attenuating tip (110, 210, 310, 410).
    [0005]
    5. Selective attenuation ear protector (100, 200, 300, 400, 500), according to claim 1, CHARACTERIZED by the fact that the sealing block (336) follows an arcuate path when switched between the first position and the second position.
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    法律状态:
    2018-11-21| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-11-26| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-02-23| B06A| Patent application procedure suspended [chapter 6.1 patent gazette]|
    2021-06-08| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-08-03| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 19/12/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/734,268|US9814625B2|2013-01-04|2013-01-04|Selective attenuating earplug|
    US13/734,268|2013-01-04|
    PCT/US2013/076441|WO2014107319A1|2013-01-04|2013-12-19|Selective attenuating earplug|
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