CN112066833A - Tape measure device - Google Patents
Tape measure device Download PDFInfo
- Publication number
- CN112066833A CN112066833A CN202010932382.7A CN202010932382A CN112066833A CN 112066833 A CN112066833 A CN 112066833A CN 202010932382 A CN202010932382 A CN 202010932382A CN 112066833 A CN112066833 A CN 112066833A
- Authority
- CN
- China
- Prior art keywords
- tape measure
- brush
- fixedly arranged
- close
- hollow shell
- 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.)
- Withdrawn
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 23
- 239000011148 porous material Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000428 dust Substances 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/10—Measuring tapes
- G01B3/1041—Measuring tapes characterised by casings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/50—Cleaning by methods involving the use of tools involving cleaning of the cleaning members
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/10—Measuring tapes
- G01B3/1005—Means for controlling winding or unwinding of tapes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Cleaning In General (AREA)
Abstract
The invention discloses a tape measure device, which comprises a hollow shell, wherein a tape measure is arranged in the hollow shell, one side of the inner wall of the hollow shell is provided with an outlet groove, one end of the tape measure, which is positioned outside the hollow shell, is fixedly provided with a copper sheet, and the tape measure device is characterized in that: the automatic cleaning device is characterized in that a supporting block is fixedly arranged on the outlet groove, a hairbrush is fixedly arranged on the side face, close to the tape measure, of the supporting block, the hairbrush is in contact with the two faces of the tape measure, and therefore the tape measure can be cleaned without manual cleaning.
Description
Technical Field
The invention belongs to the field of hardware, and particularly relates to a tape measure device.
Background
The measuring tape is a commonly used measuring tool in daily life, people often see that steel measuring tapes are commonly used for building and decoration, and are one of necessary tools for families, but the existing measuring tape is not easy to see the reading after being stained with dust, so that the measuring tape is frequently cleaned manually, and the use of the measuring tape is influenced.
Disclosure of Invention
The invention provides a tape measure device which can clean a tape measure so as to avoid manual cleaning.
In order to achieve the purpose, the invention adopts the following technical scheme: a tape measure device comprises a hollow shell, wherein a tape measure is arranged in the hollow shell, an outlet groove is formed in one side of the inner wall of the hollow shell, a copper sheet is fixedly arranged at one end, located outside the hollow shell, of the tape measure, a supporting block is fixedly arranged on the outlet groove, a brush is fixedly arranged on one side face, close to the tape measure, of the supporting block, and the brush is in contact with two faces of the tape measure.
The cleaning device comprises a hollow shell and is characterized in that a supporting block is fixedly arranged on the inner wall of the hollow shell, a cleaning assembly is arranged on the supporting block, the cleaning assembly comprises a cleaning piece for cleaning a hairbrush and a driving piece for starting the cleaning piece, and an auxiliary piece is arranged on the supporting block.
The auxiliary part comprises a sliding chute arranged on the end face of one end, close to the tape measure, of the supporting block, a communicating hole is formed in the supporting block, one end of the communicating hole is communicated with the side wall, away from the hairbrush, of one side of the sliding chute, the other end of the communicating hole penetrates through the inner wall of the mesoporous shell and is located on the side face, close to the copper sheet, of one side of the hollow shell, a moving block capable of moving and sealing in a reciprocating mode is arranged at one end, close to the hairbrush, of the communicating hole, a supporting block is fixedly arranged at one end, close to the hairbrush, of the supporting block, a reset spring used for resetting the supporting block is fixedly arranged between one end, close to the hairbrush, of the; when the tape measure completely enters the hollow shell, the copper sheet can push the pushing block to move towards the direction far away from the copper sheet, so that the space in the communicating hole is reduced, the air pressure is increased, the increased air pressure can push the moving block to move, the moving block can drive the supporting block to move towards the direction close to the reset spring, and the supporting block is no longer positioned at the lower side of the first rotating roller, so that the friction force between the first rotating roller and the tape measure can be reduced, the first rotating roller can rotate, and the driving piece can be ensured to drive the cleaning piece to operate the cleaning brush; through pulling out the tape measure back, because copper sheet and separation, reset spring can promote a piece after having lost the hindrance of copper sheet and remove towards the intercommunicating pore, lets a piece can arrive the downside of first rotatory roller again to can make the tape measure by the clamp between a piece and first rotatory roller, let the frictional force increase between tape measure and the first rotatory roller, thereby the interference can drive first rotatory roller rotatory.
The driving piece comprises a first transmission shaft which is rotatably arranged between two side walls of the hollow shell, a first rotating roller of which the outer surface is contacted with the hairbrush is fixedly arranged on the first transmission shaft, a second transmission shaft is rotatably arranged on the side wall of the hollow shell, a second rotating roller which is contacted with the first rotating roller is fixedly arranged on the second transmission shaft, a matching wheel is fixedly arranged on the second transmission shaft, a rotating pipe is rotatably arranged on the side wall of the hollow shell, a rotating gear which is meshed with the matching wheel is fixedly arranged on the rotating pipe, a torsion spring for resetting the rotating pipe is fixedly arranged between the rotating pipe and the inner wall of the hollow shell, and a clockwork spring for resetting the second transmission shaft is fixedly arranged between the second transmission shaft and the inner wall of the hollow shell; the setting through clockwork spring can hinder the displacement velocity of tape measure when the tape measure can reach the cavity casing to the interference can let the brush clear up the tape measure cleaner, avoids tape measure displacement velocity too fast and can't let the brush clean the surface of tape measure, clockwork spring still can provide power for the driving piece when reseing simultaneously, thereby need not to establish drive arrangement in addition, makes the structure simpler, has also practiced thrift the energy.
The cleaning component comprises an air cavity arranged in the side wall of the hollow shell, a thread groove is arranged in the air cavity and the hollow shell in a communicating way, a threaded rod is connected with the internal thread of the threaded groove, a rectangular hole is arranged on the rotary gear, a rectangular block positioned in the rectangular hole is fixedly arranged at one end of the threaded rod close to the rectangular hole, a rectangular piston block is fixedly arranged at one end of the threaded rod far away from the rectangular hole, the rectangular piston block is arranged in the air cavity in a reciprocating, sealing and sliding manner, a first air groove is arranged on the side surface of one side of the supporting block close to the hairbrush, a first air hole is communicated and arranged between the air cavity and the first air groove, a support block is fixedly arranged between the inner walls of the hollow shell, a second air groove is formed in the end face, close to the hairbrush, of the support block, and a second air hole is formed between the second air groove and the air cavity in a communicating mode; the reset of the clockwork spring can drive the disc to rotate, the disc can drive the rotating gear to rotate, the rotating gear can drive the threaded rod to rotate, the threaded rod can move towards one end close to the rotating gear through the matching with the threaded hole while rotating, when the ratchet teeth on the disc rotate to the other side and are not contacted with the rotating gear, the rotating gear can reset under the action of the torsion spring, at the moment, the threaded rod can move towards one end far away from the rotating gear, the threaded rod can drive the rectangular piston block to move towards one end far away from the rotating gear, so that the air can be sprayed from the first air groove and the second air groove to the brush through the rotary pipe and the second air hole, the dust on the brush is blown off, the rectangular piston block can reciprocate for a plurality of times through the arrangement of the torsion spring, thereby can carry out many times intermittent type to the brush and blow dirt to the interference can let the brush by clear cleaner.
The matching wheel comprises a disc, and a plurality of ratchets are fixedly arranged on one half of the outer surface of the disc.
In summary, the invention has the following advantages: the product is simple in structure, and the tape can be cleaned without manual cleaning, so that the tape can be used more conveniently.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is a partial sectional view taken at B-B in fig. 2.
Fig. 4 is an enlarged view of fig. 1 at C.
In the figure, the hollow shell 1, the measuring tape 2, the outlet groove 3, the copper sheet 555, the supporting block 99, the brush 4, the supporting block 5, the sliding groove 50, the moving block 20, the supporting block 51, the return spring 52, the first transmission shaft 100, the first rotating roller 101, the second transmission shaft 102, the second rotating roller 103, the matching wheel 104, the rotating tube 105, the torsion spring 305, the clockwork spring 106, the air cavity 300, the threaded groove 301, the threaded rod 302, the rectangular block 303, the rectangular piston block 304, the first air groove 500, the first air hole 310, the support block 400, the second air groove 401, the second air hole 402, the circular disc 600, the meshing teeth 601 and the ratchet 605.
Detailed Description
As shown in fig. 1 to 4, a tape measure device, particularly for use in plastering a wall, includes a hollow housing 1, a tape measure 2 is disposed in the hollow housing 1, an outlet slot 3 is disposed on one side of an inner wall of the hollow housing 1, and a copper sheet 555 is fixedly disposed at an end of the tape measure 2 outside the hollow housing 1, wherein: a supporting block 99 is fixedly arranged on the outlet groove 3, a brush 4 is fixedly arranged on the side face of one side, close to the tape measure 2, of the supporting block 99, and the brush 4 is in contact with two faces of the tape measure 2.
The cleaning device is characterized in that a supporting block 5 is fixedly arranged on the inner wall of the hollow shell 1, a cleaning assembly is arranged on the supporting block 5, the cleaning assembly comprises a cleaning piece for cleaning the brush 4 and a driving piece for starting the cleaning piece, and an auxiliary piece is arranged on the supporting block 5.
The auxiliary member is including setting up spout 50 on the one end terminal surface that is close to tape measure 2 at supporting shoe 5, be provided with a intercommunication hole in the supporting shoe 5, the one end intercommunication of intercommunicating pore sets up on spout 50 keeps away from one side lateral wall of brush 4, and the other end passes mesopore casing 1's inner wall and lies in one side that cavity casing 1 is close to copper sheet 555, the one end that the intercommunicating pore is close to brush 4 is provided with a sealed movable block 20 of reciprocating motion, the fixed one end that is provided with a piece 51 that is provided with of movable block 20 fixed brush 4, a reset spring 52 that is used for letting a piece 51 reset sets firmly between one end that piece 51 is close to brush 4 and one side lateral wall that spout 50 is close to brush 4, the one end that the intercommunicating pore is close to copper sheet.
The driving member comprises a first transmission shaft 100 rotatably disposed between both side walls of the hollow housing 1, a first rotating roller 101 having an outer surface contacting the brush 4 is fixedly provided on the first transmission shaft 100, a second transmission shaft 102 is rotatably arranged on the side wall of the hollow shell 1, a second rotating roller 103 which is contacted with the first rotating roller 101 is fixedly arranged on the second transmission shaft 102, a matching wheel 104 is fixedly arranged on the second transmission shaft 102, a rotating pipe 105 is rotatably arranged on the side wall of the hollow shell 1, a rotating gear 106 engaged with the matching wheel 104 is fixedly arranged on the rotating tube 105, a torsion spring 305 for resetting the rotating tube 105 is fixedly arranged between the rotating tube 105 and the inner wall of the hollow shell 1, a clockwork spring 106 for resetting the second transmission shaft 102 is fixedly arranged between the second transmission shaft 102 and the inner wall of the hollow shell 1.
The cleaning part comprises an air cavity 300 arranged in the side wall of the hollow shell 1, a thread groove 301 is communicated and arranged in the air cavity 300 and the hollow shell 1, a threaded rod 302 is connected in the thread groove 301 in a threaded manner, a rectangular hole is arranged on the rotary gear 106, a rectangular block 303 positioned in the rectangular hole is fixedly arranged at one end, close to the rectangular hole, of the threaded rod 302, a rectangular piston block 304 is fixedly arranged at one end, far away from the rectangular hole, of the threaded rod 302, the rectangular piston block 304 is arranged in the air cavity 300 in a reciprocating sealing and sliding manner, a first air groove 500 is arranged on one side surface, close to the brush 4, of the support block 5, a first air hole 310 is communicated and arranged between the air cavity 300 and the first air groove 500, a support block 400 is fixedly arranged between the inner wall of the hollow shell 1, and a second air groove 401 is arranged at one end surface, close to the, and a second air hole 402 is communicated between the second air groove 401 and the air cavity 300.
The engaging wheel 104 includes a circular disc 600, and a plurality of ratchet teeth 605 are fixedly provided on one half of the outer surface of the circular disc 600.
The working principle is as follows: after the tape measure is pulled out, the tape measure 2 is released by hand, the tape measure 2 retracts into the hollow shell 1, the tape measure moving into the hollow shell 1 is contacted with the first rotating roller 101, the first rotating roller 101 is driven to rotate by virtue of friction force, the first rotating roller 101 drives the second rotating roller 103 to rotate by virtue of friction force, when the tape measure 2 completely enters the hollow shell, the copper sheet 555 can push the pushing block 666 to move towards the direction away from the copper sheet 555, the space in the communicating hole is reduced, the air pressure is increased, the increased air pressure can push the moving block 20 to move, the moving block 20 can drive the supporting block 51 to move towards the direction close to the reset spring 52, the supporting block 51 is not positioned at the lower side of the first rotating roller 101, meanwhile, the lower side of the tape measure 2 is not provided with the supporting block 51, the friction force between the tape measure 2 and the first rotating roller 101 is reduced, and then the spring is reset after the friction force between the tape measure 2 and the first rotating roller, reset and to drive the disc 600 rotatory, the disc 600 can drive the swivelling gear 106 rotatory, the swivelling gear 106 can drive the threaded rod 302 rotatory, can let the threaded rod 302 remove towards the one end that is close to the swivelling gear 106 through the cooperation with the screw hole when the threaded rod 302 is rotatory, when a plurality of ratchets 605 on the disc 600 rotate the opposite side not with the swivelling gear 106 contact, the swivelling gear 106 can reset under the effect of torsional spring, can let the threaded rod 302 remove towards the one end of keeping away from the swivelling gear 106 this moment, the threaded rod 302 can drive the one end removal of rectangular piston piece 304 towards keeping away from the swivelling gear 106, thereby can spout the brush from first air groove and second air groove with gas through rotatory pipe 105 and second gas pocket 402 on, blow off the dust on the brush.
Claims (6)
1. The utility model provides a tape measure device, includes cavity casing 1, be provided with a tape measure 2 in the cavity casing 1, the inner wall one side of cavity casing 1 is provided with an export groove 3, the one end that tape measure 2 is located cavity casing 1 outside is fixed and is provided with a copper sheet 555, its characterized in that: a supporting block 99 is fixedly arranged on the outlet groove 3, a brush 4 is fixedly arranged on the side face of one side, close to the tape measure 2, of the supporting block 99, and the brush 4 is in contact with two faces of the tape measure 2.
2. A tape measure device according to claim 1, wherein: the cleaning device is characterized in that a supporting block 5 is fixedly arranged on the inner wall of the hollow shell 1, a cleaning assembly is arranged on the supporting block 5, the cleaning assembly comprises a cleaning piece for cleaning the brush 4 and a driving piece for starting the cleaning piece, and an auxiliary piece is arranged on the supporting block 5.
3. A tape measure device according to claim 2, wherein: the auxiliary member is including setting up spout 50 on the one end terminal surface that is close to tape measure 2 at supporting shoe 5, be provided with a intercommunication hole in the supporting shoe 5, the one end intercommunication of intercommunicating pore sets up on spout 50 keeps away from one side lateral wall of brush 4, and the other end passes mesopore casing 1's inner wall and lies in one side that cavity casing 1 is close to copper sheet 555, the one end that the intercommunicating pore is close to brush 4 is provided with a sealed movable block 20 of reciprocating motion, the fixed one end that is provided with a piece 51 that is provided with of movable block 20 fixed brush 4, a reset spring 52 that is used for letting a piece 51 reset sets firmly between one end that piece 51 is close to brush 4 and one side lateral wall that spout 50 is close to brush 4, the one end that the intercommunicating pore is close to copper sheet.
4. A tape measure device according to claim 1, wherein: the driving member comprises a first transmission shaft 100 rotatably disposed between both side walls of the hollow housing 1, a first rotating roller 101 having an outer surface contacting the brush 4 is fixedly provided on the first transmission shaft 100, a second transmission shaft 102 is rotatably arranged on the side wall of the hollow shell 1, a second rotating roller 103 which is contacted with the first rotating roller 101 is fixedly arranged on the second transmission shaft 102, a matching wheel 104 is fixedly arranged on the second transmission shaft 102, a rotating pipe 105 is rotatably arranged on the side wall of the hollow shell 1, a rotating gear 106 engaged with the matching wheel 104 is fixedly arranged on the rotating tube 105, a torsion spring 305 for resetting the rotating tube 105 is fixedly arranged between the rotating tube 105 and the inner wall of the hollow shell 1, a clockwork spring 106 for resetting the second transmission shaft 102 is fixedly arranged between the second transmission shaft 102 and the inner wall of the hollow shell 1.
5. A tape measure device according to claim 4, wherein: the cleaning part comprises an air cavity 300 arranged in the side wall of the hollow shell 1, a thread groove 301 is communicated and arranged in the air cavity 300 and the hollow shell 1, a threaded rod 302 is connected in the thread groove 301 in a threaded manner, a rectangular hole is arranged on the rotary gear 106, a rectangular block 303 positioned in the rectangular hole is fixedly arranged at one end, close to the rectangular hole, of the threaded rod 302, a rectangular piston block 304 is fixedly arranged at one end, far away from the rectangular hole, of the threaded rod 302, the rectangular piston block 304 is arranged in the air cavity 300 in a reciprocating sealing and sliding manner, a first air groove 500 is arranged on one side surface, close to the brush 4, of the support block 5, a first air hole 310 is communicated and arranged between the air cavity 300 and the first air groove 500, a support block 400 is fixedly arranged between the inner wall of the hollow shell 1, and a second air groove 401 is arranged at one end surface, close to the, and a second air hole 402 is communicated between the second air groove 401 and the air cavity 300.
6. A tape measure device according to claim 4, wherein: the engaging wheel 104 includes a circular disc 600, and a plurality of ratchet teeth 605 are fixedly provided on one half of the outer surface of the circular disc 600.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010932382.7A CN112066833A (en) | 2020-09-08 | 2020-09-08 | Tape measure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010932382.7A CN112066833A (en) | 2020-09-08 | 2020-09-08 | Tape measure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112066833A true CN112066833A (en) | 2020-12-11 |
Family
ID=73664080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010932382.7A Withdrawn CN112066833A (en) | 2020-09-08 | 2020-09-08 | Tape measure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112066833A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461069A (en) * | 2021-01-28 | 2021-03-09 | 宁波柯力传感科技股份有限公司 | Tape measure with 3D volume measurement function |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206258030U (en) * | 2016-12-06 | 2017-06-16 | 北京居佳祥和装饰工程有限公司 | A kind of portable tape measure of self-cleaning |
| CN108212882A (en) * | 2017-12-28 | 2018-06-29 | 蔡樟鹏 | A kind of project cost tape measure cleaning equipment |
| CN209706678U (en) * | 2019-04-24 | 2019-11-29 | 天津金色方圆仪器仪表有限公司 | A kind of novel self-cleaning steel tape |
| CN209745145U (en) * | 2018-12-10 | 2019-12-06 | 江苏中房工程咨询有限公司 | Tape measure with cleaning device |
| CN210268402U (en) * | 2019-07-26 | 2020-04-07 | 四川同创建设工程管理有限公司 | Building supervision is with detecting instrument |
| CN211234173U (en) * | 2020-02-01 | 2020-08-11 | 董如宽 | Dipperstick for civil engineering |
| CN211425234U (en) * | 2019-12-18 | 2020-09-04 | 赵志强 | Building engineering measuring tool convenient to carry |
-
2020
- 2020-09-08 CN CN202010932382.7A patent/CN112066833A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206258030U (en) * | 2016-12-06 | 2017-06-16 | 北京居佳祥和装饰工程有限公司 | A kind of portable tape measure of self-cleaning |
| CN108212882A (en) * | 2017-12-28 | 2018-06-29 | 蔡樟鹏 | A kind of project cost tape measure cleaning equipment |
| CN209745145U (en) * | 2018-12-10 | 2019-12-06 | 江苏中房工程咨询有限公司 | Tape measure with cleaning device |
| CN209706678U (en) * | 2019-04-24 | 2019-11-29 | 天津金色方圆仪器仪表有限公司 | A kind of novel self-cleaning steel tape |
| CN210268402U (en) * | 2019-07-26 | 2020-04-07 | 四川同创建设工程管理有限公司 | Building supervision is with detecting instrument |
| CN211425234U (en) * | 2019-12-18 | 2020-09-04 | 赵志强 | Building engineering measuring tool convenient to carry |
| CN211234173U (en) * | 2020-02-01 | 2020-08-11 | 董如宽 | Dipperstick for civil engineering |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461069A (en) * | 2021-01-28 | 2021-03-09 | 宁波柯力传感科技股份有限公司 | Tape measure with 3D volume measurement function |
| CN112461069B (en) * | 2021-01-28 | 2021-06-01 | 宁波柯力传感科技股份有限公司 | Tape measure with 3D volume measurement function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201211 |
|
| WW01 | Invention patent application withdrawn after publication |