CN212087803U - Hair follicle cryogenic storage device - Google Patents

Hair follicle cryogenic storage device Download PDF

Info

Publication number
CN212087803U
CN212087803U CN202020719988.8U CN202020719988U CN212087803U CN 212087803 U CN212087803 U CN 212087803U CN 202020719988 U CN202020719988 U CN 202020719988U CN 212087803 U CN212087803 U CN 212087803U
Authority
CN
China
Prior art keywords
refrigerator
hair follicle
storage device
temperature
cryogenic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202020719988.8U
Other languages
Chinese (zh)
Inventor
罗闽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Xiangmei Medical Technology Co ltd
Original Assignee
Suzhou Xiangmei Medical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Xiangmei Medical Technology Co ltd filed Critical Suzhou Xiangmei Medical Technology Co ltd
Priority to CN202020719988.8U priority Critical patent/CN212087803U/en
Application granted granted Critical
Publication of CN212087803U publication Critical patent/CN212087803U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The utility model provides a hair follicle low temperature storage facilities, include: the refrigerator comprises a refrigerator body, a door body and a refrigerator body, wherein a cavity is formed in the refrigerator body, and a refrigerator body opening is formed in the top of the refrigerator body; the refrigerator is arranged in the cavity of the box body and comprises a refrigeration component and a shell for sealing the refrigeration component, and at least the upper part of the shell is made of metal material; the metal panel is connected with the upper part of the shell and embedded in the box opening or positioned below the box opening. According to the utility model discloses a hair follicle low temperature storage equipment, the volume is less, refrigeration efficiency is higher, stable in structure, the accurate and maintenance of being convenient for of accuse temperature.

Description

Hair follicle cryogenic storage device
Technical Field
The utility model relates to a medical science field of planting hair, concretely relates to hair follicle low temperature storage equipment.
Background
The hair follicle is small in size, requires a low-temperature environment to guarantee cell activity, can only be stored in a tray by using a culture dish, and needs to be placed and taken at any time in the operation process.
The common hair follicle storage mode is a refrigerator, a refrigerated cabinet or an ice block mode, but the refrigerator or the refrigerated cabinet is too large to facilitate security protection, the time delay of opening and closing the refrigerator or the refrigerated cabinet is more, the operation is not facilitated, the stains in the operation process also have great influence on the refrigerator or the refrigerated cabinet, the ice block cooling is limited in time, and the temperature control effect in the long-time operation process cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a hair follicle low temperature storage equipment, the volume is less, refrigeration efficiency is higher, stable in structure, accuse temperature is accurate and be convenient for maintain.
In order to solve the technical problem, on the one hand, the utility model provides a hair follicle low temperature storage equipment includes:
the refrigerator comprises a refrigerator body, a door body and a refrigerator body, wherein a cavity is formed in the refrigerator body, and a refrigerator body opening is formed in the top of the refrigerator body;
the refrigerator is arranged in the cavity of the box body and comprises a refrigeration component and a shell for sealing the refrigeration component, and at least the upper part of the shell is made of metal material;
the metal panel is connected with the upper part of the shell and embedded in the box opening or positioned below the box opening.
Further, the casing is including being formed with open-ended cuboid casing, encircleing and protrusion the open-ended flange of cuboid casing and covering just surpass the metal decking of flange, metal decking is surpassing the region of flange is formed with the connecting hole, passes through bolt or bolt the connecting hole with metal decking links to each other.
Further, the refrigeration components comprise a compressor and/or semiconductor refrigeration components.
Further, the cryogenic hair follicle storage device further comprises:
the temperature sensor is arranged on the refrigerator or the metal panel and used for measuring temperature;
and the temperature controller is connected with the temperature sensor and the refrigerator and is used for controlling the refrigerator so that the temperature measured by the temperature sensor reaches a preset temperature.
Further, the cryogenic hair follicle storage device further comprises:
the display is embedded on the box body and connected with the temperature controller and used for displaying the temperature.
Further, the cryogenic hair follicle storage device further comprises: the fan penetrates through the side face of the box body.
Further, the cryogenic hair follicle storage device further comprises:
the power transformer is arranged at the bottom of the box body and used for supplying power to the hair follicle low-temperature storage equipment;
a connector connected to the power transformer and an external power source, for inputting power of the external power source to the power transformer;
and the switch is connected with the connector and used for controlling the on-off of the connector.
Further, the cryogenic hair follicle storage device further comprises:
the partition board is arranged in the box body and used for dividing the box body into an upper layer space and a lower layer space, the refrigerator is arranged on the partition board, the fan is located in the upper layer space of the box body, and the connector, the switch, the power transformer and the display are arranged in the lower layer space of the box body;
4 support columns, 4 the support column setting is in 4 corners of baffle, just the both ends of support column are connected the baffle with the bottom of box.
Further, the cryogenic hair follicle storage device further comprises:
a metal plate disposed on the metal panel.
Further, the cryogenic hair follicle storage device further comprises:
4 feet, 4 the feet set up 4 corners in the bottom of box respectively.
The above technical scheme of the utility model one of following beneficial effect has at least:
according to the utility model discloses a hair follicle cryogenic storage equipment, including box, refrigerator and metal decking, form an inclosed space through the casing of refrigerator, set up the refrigeration components and parts in this inclosed space, can avoid the erosion of external gas, liquid and pollutant to the refrigeration components and parts, make the stability of refrigerator higher, and the inclosed space can reduce the refrigerator and external heat exchange, promote cryogenic efficiency, can realize less volume and reach lower temperature, thereby can make small-size equipment, can dispose the annex suitable for operating personnel at any time and any place in the operation process, the doctor of being convenient for operates;
furthermore, the metal panel is periodically detached for cleaning and maintenance, so that the cleanliness and the temperature transfer capacity of the metal panel can be improved, and the metal panel is more suitable for being used in an operation environment;
further, the hair follicle low-temperature storage device also comprises a temperature sensor and a temperature controller, so that high-precision temperature adjustment can be realized, the temperature can be stably maintained at a preset temperature, and the hair follicle tissue cell culture dish is placed in the environment with the preset temperature, so that the hair follicle tissue cells can be guaranteed to be better alive.
Drawings
Fig. 1 is a schematic structural diagram of a hair follicle cryogenic storage device according to an embodiment of the present invention;
FIG. 2 is a rear view of the cryogenic hair follicle storage device of FIG. 1;
FIG. 3 is a schematic diagram of the refrigerator of the follicular cryogenic storage device of FIG. 1;
fig. 4 is a schematic structural diagram of a tank body of the hair follicle cryogenic storage device in fig. 1;
fig. 5 is a schematic structural diagram of a removing box body in the hair follicle cryogenic storage device in fig. 1.
Reference numerals:
100. a box body; 110. the box body is provided with an opening; 200. a refrigerator; 210. a housing; 211. a metal cover plate; 212. blocking edges; 213. a rectangular parallelepiped housing; 300. a metal panel; 400. a display; 500. a connector; 510. a switch; 600. a fan; 700. a metal disc; 800. footing; 900. a support pillar; 1000. a cryogenic storage device for hair follicles.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Fig. 1-5 show an alternative embodiment of a hair follicle cryogenic storage device 1000 according to the present invention. As shown in fig. 1 to 5, a hair follicle cryogenic storage device 1000 according to the present invention includes a case 100, a refrigerator 200, and a metal panel 300.
In which a chamber is formed in the case 100, and a case opening 110 is formed at the top of the case 100.
The enclosure 100 may be understood as an enclosure with an enclosure opening 110 at the top that may be used to shield the follicular cryogenic storage device 1000.
The refrigerator 200 is disposed in the cavity of the cabinet 100, the refrigerator 200 includes a refrigeration component and a housing 210 for sealing the refrigeration component, and at least an upper portion of the housing 210 is made of a metal material.
That is, a closed space is formed by the case 210 of the refrigerator 200, and a refrigeration component is disposed in the closed space. From this, can avoid the erosion of external gas, liquid and pollutant to refrigeration components and parts for refrigerator 200's stability is higher, and inclosed space can reduce with external heat exchange, promotes cryogenic efficiency, can realize that less volume reaches lower temperature, thereby can make the small-size equipment.
At least the upper portion of the housing 210 is made of a metal material, in other words, the metal material on the upper portion of the housing 210 transfers the low temperature generated by the refrigerator 200 to provide a low temperature platform on which a culture dish containing hair follicle tissue cells can be placed to provide the required temperature for maintaining the activity of the hair follicle tissue cells. Therefore, the low-temperature storage of the hair follicle tissue cells can be realized, and the hair follicle tissue cells can be configured at accessories suitable for operating personnel at any time and any place in the operation process, so that the operation of doctors is facilitated.
Alternatively, the shell 210 may be made of a heat insulating material except for a metal material for transferring temperature on the upper portion, or the whole shell 210 may be made of a metal material, and a heat insulating coating or a heat insulating film may be provided on the other positions except for the region for transferring temperature on the upper portion of the shell 210, so that the cooling efficiency can be further improved.
The metal panel 300 is coupled to an upper portion of the housing 210 and is embedded in the case opening 110 or positioned below the case opening 110.
That is, the metal panel 300 is connected to the housing 210, and the temperature of the housing 210 is further transmitted through the metal panel 300. The metal panel 300 is embedded in the box opening 110 (the top of the metal panel 300 is flush with the top of the box opening 110 or the top of the metal panel 300 protrudes out of the box opening 110) or is located below the box opening 110. in use, a culture dish containing hair follicle tissue cells can be placed on the metal panel 300, and the temperature required by the hair follicle tissue cells in the culture dish is maintained by the low-temperature metal panel 300. Even in the use, spot, steam, solution etc. drip to metal panel 300, can not cause the influence to refrigerator 200, promote refrigerator 200's life, wash and maintain through regularly dismantling metal panel 300, can improve metal panel 300's cleanliness factor and temperature transmissibility, more be favorable to being suitable for in the operation environment.
Further, the case 210 includes a rectangular parallelepiped case 213 formed with an opening, a rib 212 surrounding and protruding the opening of the rectangular parallelepiped case 213, and a metal cover plate 211 covering and protruding the rib 212, the metal cover plate 211 being formed with a connection hole at a region beyond the rib 212, and being connected to the metal panel 300 by a bolt or a bolt passing through the connection hole.
For example, as shown in the refrigerator 200 shown in fig. 3, the rectangular parallelepiped housing 213 at the bottom of the housing 210 of the refrigerator 200 can accommodate relatively more refrigeration components, and the rib 212 at the middle part can further reduce the low temperature region, thereby improving the cooling efficiency.
A screw hole may be formed in the metal panel 300 by connecting a bolt or a screw, which is screwed into the metal panel 300 through the connection hole of the metal cover 211 and the screw hole of the metal panel 300 or directly driven into the metal panel 300 through the connection hole, to the metal panel 300 through the connection hole of the metal cover 211 of the upper portion of the case 210 of the refrigerator 200, which is beyond the rib 212. From this, can realize metal covering 211 and metal decking 300's in close contact with, be convenient for metal covering 211 transmission temperature to metal decking 300, promote refrigeration efficiency, avoided passing the sealed region of casing 210 with bolt or bolt, lead to the condition of destroying the leakproofness of casing 210.
The refrigeration components can comprise a compressor and/or semiconductor refrigeration components.
That is to say, the components of the refrigerator 200 may only include a compressor, or only include a semiconductor refrigeration component, or the compressor and the semiconductor refrigeration component may be combined, and may be selected according to actual conditions and requirements. The compressor refrigeration and semiconductor refrigeration component technology is mature, and the specific structure is not detailed here.
The semiconductor refrigeration component is relatively smaller in size, relatively good in cooling efficiency, almost free of noise and relatively high in relative advantage in an operation environment.
According to some embodiments of the present invention, hair follicle cryogenic storage device 1000 further comprises a temperature sensor and a temperature controller.
The temperature sensor is provided on the refrigerator 200 or the metal panel 300 to measure temperature.
The temperature controller connects the temperature sensor with the refrigerator 200, and controls the refrigerator 200 such that the temperature measured by the temperature sensor reaches a predetermined temperature.
During use, the temperature at which the activity of hair follicle cells is most appropriate can be set to a predetermined temperature by the temperature controller, which controls the operation of the refrigerator 200 based on the predetermined temperature and the temperature measured by the temperature sensor so that the measured temperature of the temperature sensor coincides with the predetermined temperature. Therefore, the temperature can be regulated with high precision and can be kept at the preset temperature stably, and the hair follicle tissue cell culture dish can be placed in the environment with the preset temperature to ensure that the hair follicle tissue cells can survive well.
Further, the hair follicle cryogenic storage device 1000 also comprises a display 400, and the display 400 is embedded on the box body 100 and connected with the temperature controller for displaying the temperature.
That is, the temperature measured by the current temperature sensor and the predetermined temperature can be seen through the display 400. Therefore, the temperature condition can be conveniently and accurately known by a user, and the related operation is convenient to carry out.
Further, the hair follicle low-temperature storage device 1000 further comprises a fan 600, and the fan 600 is arranged on the side surface of the box body 100 in a penetrating way.
For example, as shown in fig. 2, 2 fans 600 are disposed through the side of the box 100, that is, 2 openings are formed on the side of the box 100, 1 fan 600 is disposed at each opening, the fan 600 may be a silent fan 600, and when the hair follicle low-temperature storage device 1000 is in operation, the fan 600 may ventilate and cool the inside of the box 100. Therefore, the stability of the devices in the box body 100 is maintained, the failure caused by overhigh temperature is avoided, and the service life of the hair follicle low-temperature storage device 1000 is prolonged.
Further, the follicular cryogenic storage device 1000 further comprises a power transformer, a connector 500 and a switch.
The power transformer is disposed at the bottom of the tank 100 for supplying power to the hair follicle cryogenic storage device 1000.
Supply power to hair follicle low temperature storage device 1000 through power transformer, can make hair follicle low temperature storage device 1000 safe and stable operation, avoid external power source's voltage unstability to cause hair follicle low temperature storage device 1000's operation abnormity.
The connector 500 is connected to a power transformer for inputting power of an external power source to the power transformer.
A switch 510 is connected to the connector 500 for controlling the on/off of the connector 500.
The on/off of the connector 500 is controlled by the switch 510, so that the on/off of the power input from the external power supply is controlled, and the switching operation of the hair follicle cryogenic storage apparatus 1000 can be performed easily and conveniently.
Further, the hair follicle cryogenic storage device 1000 also includes a partition and 4 support columns.
A partition is provided inside the cabinet 100 for dividing the cabinet 100 into an upper space and a lower space, the refrigerator 200 is provided on the partition, the fan 600 is located in the upper space of the cabinet 100, and the connector 500, the switch 510, the power transformer arrangement and display 400 are provided in the lower space of the cabinet 100.
4 support columns 900 are provided at 4 corners of the partition, and both ends of the support columns 900 connect the partition and the bottom of the cabinet 100.
The position of the separator can be stabilized by supporting 4 corners of the separator by 4 support columns 900.
Therefore, the box body 100 is divided by the partition plate, the refrigerator 200 is arranged on the partition plate, the interference of other devices to the refrigerator 200 can be avoided, the space formed by the cavity of the box body 100 is fully utilized, and the hair follicle storage device is smaller in size.
According to some embodiments of the present invention, hair follicle cryogenic storage device 1000 further comprises a metal disk 700.
The metal plate 700 is disposed on the metal panel 300.
Transmit low temperature through metal disc 700, can place the culture dish that holds hair follicle tissue cell on metal disc 700 to maintain hair follicle tissue cell's stability, and metal disc 700 can remove at will, the operation of the process of more convenient hair transplantation operation.
According to some embodiments of the present invention, hair follicle cryogenic storage device 1000 further includes 4 footings 800.
The 4 feet 800 are respectively disposed at the 4 corners of the bottom of the case 100.
The box body 100 is supported by the 4 feet 800, so that the stability of the hair follicle low-temperature storage device 1000 can be guaranteed, the level of the hair follicle low-temperature storage device 1000 can be adjusted by the feet 800, and the levelness of the hair follicle low-temperature storage device 1000 can be higher.
The following illustrates the application of the embodiments of the present invention in hair transplantation.
In a hair transplantation operation environment (room temperature is 25 ℃, humidity is about 25%), the hair follicle low-temperature storage device is placed at a position on an operating table where a doctor can conveniently touch, the preset temperature of the hair follicle low-temperature storage device is set to be 3-4 ℃, the temperature controller controls the refrigerator 200 to operate so that the temperature measured by the temperature sensor is 3-4 ℃, at the moment, a culture dish placed on a refrigerating area of the metal panel 300 and wet gauze in the culture dish can be maintained at the same temperature, the doctor can guarantee the activity of hair follicle tissue cells after taking the hair follicle tissue cells off and then placing the hair follicle tissue cells in the culture dish, the refrigerating effect is kept constant in the operation process of about 3 hours, and the hair follicle tissue cells can survive for a long time.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A cryogenic storage device for hair follicles, comprising:
the refrigerator comprises a refrigerator body, a door body and a refrigerator body, wherein a cavity is formed in the refrigerator body, and a refrigerator body opening is formed in the top of the refrigerator body;
the refrigerator is arranged in the cavity of the box body and comprises a refrigeration component and a shell for sealing the refrigeration component, and at least the upper part of the shell is made of metal material;
the metal panel is connected with the upper part of the shell and embedded in the box opening or positioned below the box opening.
2. The cryogenic storage device for hair follicles according to claim 1,
the casing is including being formed with open-ended cuboid casing, encircleing and protrusion the open-ended flange of cuboid casing and covering just surpass the metal covering of flange, metal covering is surpassing the region of flange is formed with the connecting hole, passes through bolt or bolt the connecting hole with metal decking links to each other.
3. The cryogenic hair follicle storage device of claim 2, wherein the refrigeration component comprises a compressor and/or a semiconductor refrigeration component.
4. The cryogenic hair follicle storage device of claim 1, further comprising:
the temperature sensor is arranged on the refrigerator or the metal panel and used for measuring temperature;
and the temperature controller is connected with the temperature sensor and the refrigerator and is used for controlling the refrigerator so that the temperature measured by the temperature sensor reaches a preset temperature.
5. The cryogenic hair follicle storage device of claim 4, further comprising:
the display is embedded on the box body and connected with the temperature controller and used for displaying the temperature.
6. The cryogenic hair follicle storage device of claim 4, further comprising:
the fan penetrates through the side face of the box body.
7. The cryogenic hair follicle storage device of claim 6, further comprising:
the power transformer is arranged at the bottom of the box body and used for supplying power to the hair follicle low-temperature storage equipment;
a connector connected to the power transformer for inputting power of an external power source to the power transformer;
and the switch is connected with the connector and used for controlling the on-off of the connector.
8. The cryogenic hair follicle storage device of claim 7, further comprising:
the partition board is arranged in the box body and used for dividing the box body into an upper layer space and a lower layer space, the refrigerator is arranged on the partition board, the fan is located in the upper layer space of the box body, and the connector, the switch, the power transformer and the display are arranged in the lower layer space of the box body;
4 support columns, 4 the support column setting is in 4 corners of baffle, just the both ends of support column are connected the baffle with the bottom of box.
9. The cryogenic hair follicle storage device of claim 1, further comprising:
a metal disc disposed on the metal panel.
10. The cryogenic hair follicle storage device of claim 1, further comprising:
4 feet, 4 the feet set up 4 corners in the bottom of box respectively.
CN202020719988.8U 2020-05-06 2020-05-06 Hair follicle cryogenic storage device Active CN212087803U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020719988.8U CN212087803U (en) 2020-05-06 2020-05-06 Hair follicle cryogenic storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020719988.8U CN212087803U (en) 2020-05-06 2020-05-06 Hair follicle cryogenic storage device

Publications (1)

Publication Number Publication Date
CN212087803U true CN212087803U (en) 2020-12-08

Family

ID=73618063

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020719988.8U Active CN212087803U (en) 2020-05-06 2020-05-06 Hair follicle cryogenic storage device

Country Status (1)

Country Link
CN (1) CN212087803U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111345286A (en) * 2020-05-06 2020-06-30 苏州祥美医疗科技有限公司 Hair follicle cryogenic storage device
CN112690271A (en) * 2020-12-28 2021-04-23 成都恒博医院有限责任公司 Constant temperature control device for autologous hair follicle transplantation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111345286A (en) * 2020-05-06 2020-06-30 苏州祥美医疗科技有限公司 Hair follicle cryogenic storage device
CN112690271A (en) * 2020-12-28 2021-04-23 成都恒博医院有限责任公司 Constant temperature control device for autologous hair follicle transplantation

Similar Documents

Publication Publication Date Title
CN111345286A (en) Hair follicle cryogenic storage device
CN212087803U (en) Hair follicle cryogenic storage device
US11150014B2 (en) Insulated chamber with packetized phase change material
US20230148051A1 (en) System and method for vaporized hydrogen peroxide cleaning of an incubation chamber
KR102290267B1 (en) Insulation chamber with phase change material and door with controllable transparency
KR101694050B1 (en) Device for reducing oxygen and storage
CN210474066U (en) Test-tube rack with heat preservation function
CN201841017U (en) Testing chamber for medicine stability
JP2015094553A (en) Oxygen reducing device and refrigerator
CN213617428U (en) Standard constant temperature and humidity curing chamber equipment
CN200949973Y (en) Medical electric refrigerator
CN104826762A (en) Independently switchable multi-cell/material assembled spray nozzle
CN214384666U (en) Two-sided takeaway cabinet of intelligence
CN204602493U (en) Independent switch type many cells/material assembling shower nozzle
CN201748568U (en) Floating box type ultrasonic-wave water-atomization refrigerating structure of cabinet type warming-and-cooling fan
CN211618709U (en) Boar semen transport case
CN207773778U (en) A kind of black plaster smart memory case
TW201218944A (en) Mini-environmental control cabinet for animal breeding and plant cultivation
CN207823083U (en) A kind of rack for test tube with cold storage function
CN208464798U (en) A kind of portable insulin bottle and novopen case
CN217779555U (en) Multifunctional blood product transport case
JPH05322405A (en) Temperarture and humidity adjusting chamber
CN203216926U (en) Temperature-controllable type immunohistochemical moisturizing box
CN216953698U (en) Moisturizing and fresh-keeping device, fruit, vegetable and flower fresh-keeping device and refrigerator
CN212778301U (en) Vacuum drying device for skin care product

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant