专利摘要:
System and device for stock control of consumable items, which are arranged in compartments (12) of a basket (11), cabinet, shelf, shelf or similar, by using the kanban or double compartment procedure. The device (1) comprises a housing (2), a control unit (3), at least one battery (4) and a wireless transceiver module (5). The casing (2) has at least one groove (16) made in its base (6), prepared to fit in a section of the upper part of the walls (15) of at least two adjacent compartments (12). The device (1) comprises at least two rods (17) that start from the base (6) of the housing (2), each rod (17) having a proximity sensor (8) connected to the control unit (3). ) by cable (7) and configured to detect the presence or absence of consumable items in the compartment (12) in which it is located. (Machine-translation by Google Translate, not legally binding)
公开号:ES2555632A1
申请号:ES201531012
申请日:2015-07-10
公开日:2016-01-05
发明作者:Carlos Manuel SANDE MARTÍNEZ;José Antonio LOSAS DEVESA;Juan Carlos PIÑEIRO IGLESIAS
申请人:Conexiona Telecom S L;Conexiona Telecom SL;
IPC主号:
专利说明:

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System and device for stock control of consumable items
DESCRIPTION
Field of the invention
The present invention is encompassed within the field of hospital logistics systems, and more specifically in stock control systems through the use of the Kanban or double-compartment procedure in hospital consumable stores.
Background of the invention
Within the solutions for the management of repositions in hospital environments, the evolution of the process of hospital reposition and management of hospital inventory has been progressing towards the use of wireless technologies.
In the management of refills in hospital environments, the double compartment system (also known as "double drawer") is used, whereby requests for products to be replaced are managed by the Kanban procedure. One of the possible implementations of the Kanban procedure or "double drawer" is done as follows:
- Firstly, a "double drawer" stock agreement is agreed, whereby each item in the service warehouse is assigned a unique location with a double compartment (double drawer), where each compartment stores half of the agreement. of stock of that item The two drawers of each product can be positioned in different ways: left-right, top-bottom or front-back, a green identification tag is placed in front of one of the two compartments of a particular product, and a red identification tag is arranged in front of the other compartment of the same product.
- When you have to pick up a product, the nurse makes the collection always by default of the compartment of the product that has the green label attached.
- As soon as the compartment is labeled with the green identification label, the nursing staff must generate an order, for which it removes the green label and places it in an order lane.
- The order request is then carried out for those products whose green label is in the order lane.
- Once the product is repositioned, the logistics staff or the assistant
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of nursing in the service warehouse place the red label in front of the empty drawer, return the green label of the order rail to the front of the compartment you are using (older lot), the new product is located in the empty compartment then and the circuit starts again.
The request for repositioning was initially made manually by a hospital nursing staff, checking the order lane and recording the products therein.
Subsequently, a printed barcode was included in the green and red identification labels, which contains the product data (service, reference, description, supply quantity - half of the stock agreement), location of the product in storage service - closet , basket / shelf, compartment-). In this way the reading of the order is carried out by scanning, according to an agreed periodicity, the bar codes of the labels located in the order lane using a manual reader. Once the service order has been read, the reading is turned into a service warehouse management software, which automatically generates the captured order orders and, after validation, these order orders are then issued.
In order to have a greater automation of the process, and especially in regard to the reading of orders, systems with RFID tags and an RFID reading panel are currently used. In these systems the identification tags contain a passive RFID tag with the product data. For its part, the RFID reading panel is a device for storing and reading RFID tags, which has numerous boxes to locate the identification tags and that automatically performs the reading of order tags using RFID technology. The RFID panel communicates the information, usually in a wired manner, to a data collection server with an application that is responsible for preparing and sending the corresponding order to the stores. The RFID panel can even be responsible for preparing and sending the order to the central stock management system. Examples of this system are the MMSlog® RFID panel of the Medical Modular System S.A., the iPANEL of the Mattteo company, the PK-600 panel of the Palex Medical, S.A., or the KanbaNet KN60 and KF500 panels of the Stockare company.
Another automation system for the order reading process uses passive RFID tags and RFID reading mailboxes. In these systems the identification tags with the tag
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RFIDs are introduced into an RFID reading mailbox, which is responsible for storing and reading cards using RFID technology. An example of this system is the BK-200 mailbox of Palex Medical, SA, or the LogiTag StockBox® mailbox of LogiTag Ltd. The patent document US2013068833-A1 also discloses the use of RFID tags and a container with reader RFID to read the information contained in the RFID cards and make the appropriate order.
Other more advanced automation systems employ active RFID tags or wireless keypads powered by a battery, which are arranged next to the product (either next to the product identification card or replacing it). By simply activating a push button on the wireless keypad, by the nursing staff or warehouse manager, the request for an order for the product in question is transmitted wirelessly, along with the product data. The request is collected by a wireless base or RFID reader, responsible for transmitting to the software platform the order to prepare and send the order to the warehouse. Once the wireless base or RFID reader has received the order of the correct reception of the order by the software platform, it informs the active RFID tag or wireless keypad, which activates a green LED so that the user knows this circumstance and not press the order button again. Examples of active RFID tags or wireless keypads are the RFID MultiEvent 3B MMSlog® keypad from Medical Modular System SA, StoifKey® Kanban from Grifols, ReStock Tag from LogiTag Ltd., or Pyxis® JITrBUD system from CareFusion Corporation.
Wireless systems that use wireless keypads represent a significant advance in this field, by avoiding the use of passive RFID tags and reading them, either in RFID panels or in RFID mailboxes. However, they do not solve one of the fundamental problems of the system: participation in the nursing staff process to make the request. In addition, the system has a high implementation cost compared to passive RFID tags.
Patent document EP1422657-A1 tries to solve the above problem, disclosing a method to monitor stocks automatically, without human intervention. However, for this it uses a complex system of markers and a camera, not being easily implemented in hospital supplies stores.
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The present invention proposes a new wireless system that solves the aforementioned problems, since it is able to detect in a simple and automatic way the presence or absence of the product within the compartment itself without the need of intervention by any sick person, transmitting the information of the order directly to a web platform through a gateway.
Description of the invention
The present invention relates to a device for stock control of consumable items, which are arranged in compartments of a basket, closet, shelf, shelf or the like. The device comprises a housing, a control unit, at least one battery and a wireless transceiver module. The housing has at least one groove in its base and prepared to fit into a section of the upper part of the walls of at least two adjacent compartments. The device comprises at least two rods that start from the base of the housing, each rod having a proximity sensor connected to the control unit via cable and configured to detect the presence or absence of consumable items in the compartment in which it is locate.
The rods are preferably height adjustable. In a preferred embodiment the rods are removable from the base. The rods are preferably located in the base so that in position of use each rod is located in a different compartment.
The device may comprise a plurality of compartment status LEDs controlled by the control unit, each of said LEDs being associated with a different proximity sensor and configured to signal, depending on the detection performed by the associated proximity sensor, the presence or absence of consumable items in the compartment where the corresponding proximity sensor is located.
In a possible embodiment, the housing has at least two grooves prepared to fit in a section of the upper part of the walls of four adjacent compartments, and the device comprises four rods each of which is located, in use position, in A different compartment. In this embodiment, the housing can be in the form of a parallelepiped and have at its base two perpendicular grooves arranged in the longitudinal and transverse directions. The four rods
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they preferably have a length and are located in a position such that in the position of use each proximity sensor is located in the lower vertex of a different compartment.
The rods are preferably separated from each other a suitable distance to allow the walls of the compartments to fit between the rods.
The proximity sensor of each rod is preferably located at the end of the rod. The proximity sensor may comprise an infrared transmitter and an infrared receiver. Optionally, the proximity sensor may further comprise a brightness sensor, the proximity sensor being configured to adapt the frequency of the infrared emitter signal according to the detected ambient brightness. In a preferred embodiment, each proximity sensor is located, in the use position, at a vertex of the compartment. Each proximity sensor is preferably located, in use position, at the base of the compartment, each proximity sensor being configured to emit a 2D infrared plane of light at the base of the compartment.
Another aspect of the present invention relates to a system for control of stock of consumable items, comprising a plurality of devices for control of stock of consumable items as defined above, in wireless communication with a gateway configured to relay information to a server of a web stock management platform to place orders automatically. The communication between the gateway and each device is preferably bidirectional.
The present invention makes it possible to detect in the double compartment system when a product is finished and wirelessly issue an alert at the time when the consumable is finished. The technology is totally wireless and does not need the intervention of any operator.
The present invention has several advantages. On the one hand, it eliminates the use of RFID tags and the costs associated with reading them by means of RFID panels or mailboxes, avoiding re-labeling and recoding of the tag in the case that the units or format of the agreed product are changed, so saves displacement, label costs and logistic operator time. On the other hand, it eliminates from the reposition process, the participation of the sick staff, thus avoiding! errors and unnecessary work by staff at
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This function does not correspond to him. In addition, it is much less expensive than systems using push-buttons (wireless keypads) and the installation of detection devices does not require any modification of existing trays and / or shelves in hospital warehouses.
Brief description of the drawings
A series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention that is presented as a non-limiting example of this is described very briefly below.
Figure 1A shows a perspective view of the empty compartment detection device employed by the present invention. Figure 1B shows the device in perspective from a lower point of view.
Figure 2 represents a simplified scheme of the different internal components of the device.
Figure 3 shows the elements of the order management system, where the location of an empty compartment detection device can be seen in a basket where the products are arranged.
Figure 4 shows in detail the location of the empty compartment detection device at the intersection of the compartments of the basket of Figure 3.
Figure 5 shows a diagram with the elements of the proximity sensor.
Detailed description of the invention
Figures 1A and 1B show an external view of an empty compartment detection device 1 used in the management system of the present invention. Figure 2 represents a simplified scheme of the different components of device 1.
The device has a housing 2 that houses a control unit 3 (preferably a microcontroller) with a memory for storing data, a battery 4 (for example, a button battery) and a wireless transceiver module 5 (a wireless radio) that It works preferably in the ISM band of 2.4 Ghz. The microcontroller communication with
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The radio module can be done using UART or SPI. You can also use a microcontroller with an integrated radio module.
Four cables 7 start from the housing 2 at whose ends proximity sensors 8 are arranged in communication with the control unit 3. The communication between the control unit 3 and the proximity sensors 8 is preferably carried out via an I2C bus, to be able to have four sensors in a single bus. In the housing there are also five LEDs (9.9 ’) red / green and a button 10, which is located on the top of the device. The button 10 has two functions, the first function is to turn the device off or on and the second function to reset the device to factory settings. The communication of the microcontroller 3 with the LEDs (9.9 ’) and with the push-button 10 is carried out through digital inputs / outputs of the microcontroller.
Each device 1 is located, as shown in Figure 3, at the intersection of the boxes or compartments 12 of the basket 11 (or closet, shelf, shelf or similar) where the products are arranged, serving four compartments 12 (for example, boxes or trays) for each device 1. Each of the proximity sensors 8 of the device 1 is located in a different compartment 12, serving to detect the presence / absence of product from one of the compartments.
The device, in its default configuration, has only one serial number assigned. In the registration process in the system, the positions occupied by the four proximity sensors 8 are defined, assigning a product and priority to each serial number plus the sensor identifier. Once assigned to your product, the sensor is calibrated, which consists of placing the device in the assigned place, with the compartment 12 empty and sampling to obtain a value of each compartment, which is stored in the unit control 3, as a reference value for the vacuum state.
The device used for object detection is a proximity sensor and ambient light detector composed of an infrared emitter and a photo diode as a receiver, with the possibility of suppressing ambient light, in the case of direct sunlight or high light values, modulating for this, the infrared signal. The sensor incorporates an analog-digital converter to offer an I2C communication interface. The proximity sensor 8 is located at the bottom of the compartment 12 and in one of the vertices of the tray or shelf division, as shown in Figure 4, which represents in detail the location
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of the empty compartment detection device at the intersection of the walls 15 of four adjacent compartments 12. To facilitate the fixation of the device 1 at the intersection of the four compartments 12 the housing 2 has two perpendicular grooves 16 made in its base 6 and prepared to fit in a section of the upper part of the walls 15 of the four compartments 12 between which the device 1 is located. The housing 2 preferably has a parallelepiped shape, so that the grooves 16 are arranged centered, in the longitudinal and transverse direction. To facilitate the correct placement of the proximity sensors 8 in the lower vertices of each compartment 12, the cables 7 and the proximity sensors 8 are supported on rigid strips or rods (17) adjustable in height.
Inside the height-adjustable rods 17 there are tracks of the I2C bus, which is connected to the proximity sensor 8. The rod 17 may or may not be included in the device 1; that is, in situations where it becomes redundant (for example, when the compartment 12 is already monitored by the rod 17 of another device 1) or in the case that the compartment is very small, the rod can be disconnected. It can also be used redundantly in support of another proximity sensor 8 of another device 1.
The proximity sensor 8 is removable, thus allowing the rods 17 to be adjusted at different heights first, which will be defined by the height of the compartment 12. Even in some cases the proximity sensor 8 can be placed without the rod 17 .
Figure 5 shows a diagram with the different components of the proximity sensor 8. The proximity sensor 8 comprises an integrated module 80 with an infrared emitter 81 (in a preferred embodiment between 850nm and 940nm), an infrared receiver 82, a sensor brightness or ambient light 83 and a signal conditioning circuit 84 with I2C communication driver. The dimensions of the proximity sensor 8 are very small (in one embodiment, around 4 mm long, 4 mm wide and 1 mm high).
The proximity sensor 8 detects not only the presence of an object, but also its relative proximity. The proximity sensor 8 emits, using the infrared emitter 81, pulses of infrared light that are reflected in an object and return to the proximity sensor 8, picked up by the infrared receiver 82. The intensity of the reflected infrared signal is used to determine the object proximity. The change in the intensity of the reflected signal is
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used to determine if an object is far or near the proximity sensor 8. The brightness sensor 83 is used to trigger an internal event in the proximity sensor 8 indicating a change in brightness, which allows the proximity sensor 8 to mitigate possible Reading errors due to the increase in light outside the system, modifying the frequency of the infrared emitter signal 81.
The operation of the proximity sensor 8 for the detection of empty compartment or with product is described below. First, the intensity of the infrared light emitting led 81 is selected, which depends on the size of the compartment 12. Next, the proximity sensor 8 is calibrated with the empty compartment, for which the proximity sensor 8 takes a determined number of samples (for example, 250 samples) and calculates the average calibration. For the detection of the existence or not of the product, a number of samples are taken periodically (for example, 30 samples) and the average is performed. This average is then compared with the average calibration. If a certain number of averages (for example, 10 or more consecutive averages) are greater than a value of the average of calibration, it is considered that compartment 12 is not empty, that is, that there is at least one product or consumable item. If the difference is less than an average calibration value, compartment 12 is considered to be empty.
In different tests carried out it has been proven that the vertex of the compartment is the best place to place the proximity sensor 8, to take full advantage of the opening of the infrared emitter 81, since the infrared emitter 81 has a certain opening x% and the site of compartment 12 where 100% infrared light radiation is used, to have the smallest areas of shade, is the vertex. However, the proximity sensor 8 could be located anywhere else in the compartment 12, although with less efficiency. It has also been found that the position of the proximity sensor 8 attached to the base of the compartment 12 is beneficial, since most compartments have holes in the perimeter through which part of the infrared light is projected and objects that cannot be detected can be detected. they are actually inside the compartment 12, but in other adjacent compartments 12. Therefore, the best results are obtained by generating a 2D infrared light plane at the base of compartment 12. The detection range of the proximity sensor can reach, and even exceed, 20 cm.
The control unit 3 of the device 1 is responsible for receiving the information of the
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proximity sensors 8, showing the information by means of the LEDs (for example, green indicating that there is a product and red that the tray is empty), and being responsible for transmitting said information, through low-power wireless communication using the wireless transceiver module 5 , to a controller or gateway 13, which relays it to a server 14 of a web stock management platform to place the order. The communication between the gateway 13 and the device 1 is bidirectional, in order to receive the device 1 software or configuration updates, and in the case of having informed of the lack of a product, you can receive from the gateway 13 the confirmation of Reception of the request for reposition.
It can be considered that the present invention basically replaces the RFID tags located in the product compartments 12 with the proximity sensors 8. For this it is necessary to identify with a code the trays where the products will be stored (and in which they are located the proximity sensors 8) as well as until now the RFID tags were encoded. It is also necessary to relate each tray with the product, in the same way that there is a relationship between RFID tag and product. In an existing RFID tag management system, the present invention could be applied directly simply by replacing in each compartment 12 the RFID tags with the proximity sensors 8 and assigning to each proximity sensor the RFID tag code that previously identified that tray. In this way it is very simple to associate a space or tray with a product.
The five red / green LEDs of the device are:
- A 9 ’device status LED, to indicate the different states in which the device is located:
• Factory configuration: The device meets the default configuration. It is indicated with a slow green flashing.
• Normal operation: Normal operation is defined as that the device is associated with the gateway 13, has been calibrated and has the data stored, has no pending notification and has no orders placed. It is indicated with the green steady LED.
• Abnormal operation. For example, when confirmation of order reception is not received from central server 14. It is indicated with a quick red flashing.
• Receiving configuration / update. It is indicated with a quick blinking
green.
- Four leds 9 of compartment status. If compartment 12 is not empty, compartment status LED 9 is off. If compartment 12 is empty, the compartment status LED 9 lights green / red. The color of the LED (green or red) is associated with the type of product according to the Kanban double-compartment procedure, which configures the user at the start-up of the device.
The order is triggered when the device 1 detects that it has no product in a compartment 12 and will launch a product order through the gateway 13. Usually in
10 the consumption of a product is to consume the drawer identified with a green label and, once consumed, request that product and continue consuming the red drawer. The system distinguishes between drawers, since launching an order from the red drawer indicates an impact on the Kanban system.
15 As a gateway 13, any electronic device with radio communication capability could be used to communicate with the devices 1 and with remote communication capability with the central server 14, for example via the Internet. Thus, the gateway could be implemented even on a tablet, using its screen to display a web interface with product information and order status.
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权利要求:
Claims (16)
[1]
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1. Device for stock control of consumable items, which are arranged in compartments (12), where the device (1) comprises a housing (2), a control unit (3), at least one battery (4) and a wireless transceiver module (5); characterized in that the housing (2) has at least one groove (16) made in its base (6) and prepared to fit in a section of the upper part of the walls (15) of at least two adjacent compartments (12) ;
where the device (1) comprises at least two rods (17) that start from the base (6) of the housing (2), each rod (17) having a proximity sensor (8) connected to the control unit ( 3) via cable (7) and configured to detect the presence or absence of consumable items in the compartment (12) in which it is located.
[2]
2. Device according to claim 1, characterized in that the rods (17) are height adjustable.
[3]
3. Device according to any of the preceding claims, characterized in that the rods (17) are removable from the base (6).
[4]
Device according to any of the preceding claims, characterized in that the rods (17) are located in the base (6) so that in each use position each rod (17) is located in a different compartment (12).
[5]
Device according to any one of the preceding claims, characterized in that the device (1) comprises a plurality of compartment status LEDs (9) controlled by the control unit (3), each of said LEDs (9) being associated to a different proximity sensor (8) and configured to signal, depending on the detection made by the associated proximity sensor (8), the presence or absence of consumable items in the compartment (12) where the proximity sensor is located (8) corresponding.
[6]
Device according to any of the preceding claims, characterized in that the housing (2) has at least two grooves (16) prepared to fit in a section of the upper part of the walls (15) of four adjacent compartments (12) ;
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where the device (1) comprises four rods (17) each of which is located, in use position, in a different compartment (12).
[7]
7. Device according to claim 6, characterized in that the housing (2) is in the form of a parallelepiped and has at its base (6) two perpendicular grooves (16) arranged in the longitudinal and transverse directions.
[8]
Device according to any one of claims 6 to 7, characterized in that the four rods (17) have a length and are located in a position such that each proximity sensor (8) is located in the use position in the lower vertex from a different compartment (12).
[9]
Device according to any of the preceding claims, characterized in that the rods (17) are separated from each other a suitable distance to allow the walls (15) of the compartments (12) to fit between the rods (17).
[10]
Device according to any one of the preceding claims, characterized in that the proximity sensor (8) of each rod (17) is located at the end of the rod (17).
[11]
Device according to any one of the preceding claims, characterized in that the proximity sensor (8) comprises an infrared transmitter (81) and an infrared receiver (82).
[12]
12. Device according to claim 11, characterized in that the proximity sensor (8) further comprises a brightness sensor (83), the proximity sensor (8) being configured to adapt the frequency of the infrared emitter signal (81) depending on the ambient brightness detected.
[13]
13. Device according to any of the preceding claims, characterized in that each proximity sensor (8) is located, in the use position, in a vertex of the compartment (12).
[14]
14. Device according to any of the preceding claims, characterized in that each proximity sensor (8) is located, in use position, at the base of the compartment (12), each proximity sensor (8) being configured to emit a plane 2D infrared light at the base of the compartment (12).
[15]
15. Stock control system for consumable items, characterized in that it comprises a plurality of devices (1) according to any one of claims 1 to 14, in wireless communication with a gateway (13) configured to retransmits the
5 information to a server (14) of a web stock management platform to perform
Orders automatically.
[16]
16. System according to revindication 15, where communication between the gateway (13) and each device (1) is bidirectional.
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引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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