CN105365473A - Trimming paintbrush tool with spiral cutter bit - Google Patents
Trimming paintbrush tool with spiral cutter bit Download PDFInfo
- Publication number
- CN105365473A CN105365473A CN201510641428.9A CN201510641428A CN105365473A CN 105365473 A CN105365473 A CN 105365473A CN 201510641428 A CN201510641428 A CN 201510641428A CN 105365473 A CN105365473 A CN 105365473A
- Authority
- CN
- China
- Prior art keywords
- spiral
- cutter head
- hollow bushing
- spiral lamination
- lamination
- 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.)
- Granted
Links
- 238000009966 trimming Methods 0.000 title abstract 2
- 238000003475 lamination Methods 0.000 claims abstract description 48
- 210000000245 forearm Anatomy 0.000 claims description 12
- 238000013138 pruning Methods 0.000 claims description 12
- 238000005266 casting Methods 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 210000001138 tear Anatomy 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44D—PAINTING OR ARTISTIC DRAWING, NOT OTHERWISE PROVIDED FOR; PRESERVING PAINTINGS; SURFACE TREATMENT TO OBTAIN SPECIAL ARTISTIC SURFACE EFFECTS OR FINISHES
- B44D3/00—Accessories or implements for use in connection with painting or artistic drawing, not otherwise provided for; Methods or devices for colour determination, selection, or synthesis, e.g. use of colour tables
Abstract
The invention relates to a trimming paintbrush tool with a spiral cutter bit. The tool comprises the spiral cutter bit, a spiral lamination hollow casing pipe, a front arm, a rear arm and a hollow casting pipe. The spiral cutter bit comprises a spiral cutter face and a spiral cutter face end; the spiral lamination hollow casing pipe comprises a groove clamping head and a hollow spiral lamination; the front arm comprises a front arm rod, a bevel cutter bit and a hinge bolt hole; the rear wall comprises a rear arm rod, a bevel stud and a bevel nut; the hollow casing pipe comprises a groove and a hollow casing pipe body; the spiral cutter bit is fixed to the upper side face of the hollow casing pipe, and the lower portion of the spiral lamination hollow casing pipe is provided with the hollow spiral lamination; the bevel stud can freely slide in a hollow spiral lamination gap; the bevel stud is clamped in the spiral lamination hollow casing pipe so as to prevent the rear arm from falling off; and the front arm is hinged to the rear arm, and the bevel cutter bit is hinged to the front arm rod.
Description
The application is the applying date is on November 12nd, 2013, and application number is 2013105585534, and denomination of invention is the divisional application of the patent of " a kind of instrument of pruning paintbrush of improvement ".
Technical field
The present invention relates to a kind of maintenance instrument of paintbrush, specifically a kind of pruning paintbrush tool with spiral cutter head.
Background technology
The student of art major often will use paintbrush tool.Paintbrush, owing to smearing back and forth on painting canvas, making the pen hair of paintbrush wear and tear, even sticking up to turning up, and just has to change paintbrush if this thing happens.For a common student, this is a no small spending.
Some students, in order to pare down expenses, remove with scissors the paintbrush pruning wearing and tearing, extend the service life of paintbrush.But because paintbrush is all more tiny, scissors is larger again, can not paintbrush be pruned very well.And paintbrush generally weares and teares the most severe place is nib, be all nib bifurcated usually, cause paintbrush to use, only abandon.And the intrinsic structure of scissors is only suitable for cutting straight line or curve in plane, but it can not be pruned out very thin and be the nib of similar cone.
In addition, the pencil-knife that we often use also is the pencil can only cutting hard, and cannot prune the paintbrush of quality softness.Do not have the same instrument to can be good at pruning the paintbrush of wearing and tearing, extend the service life of paintbrush.This is the weak point existing for prior art.
Summary of the invention
For the defect existed in prior art, extend the service life of paintbrush.The object of the present invention is to provide a kind of instrument of pruning paintbrush of improvement.
For reaching above object, the technical scheme that the present invention takes is: a kind of instrument of pruning paintbrush of improvement, comprises spiral cutter head, spiral lamination hollow bushing, forearm, postbrachium, hollow bushing; Described spiral cutter head comprises described spiral knife face, spiral knife face termination; Described spiral lamination hollow bushing, comprises groove dop, the empty spiral lamination of thread; Described forearm comprises front armed lever, inclined-plane cutter head, link bolt hole; Described postbrachium comprises rear armed lever, chamfered studs, slant nut; Described hollow bushing comprises groove, hollow bushing body.
Described spiral cutter head is a conical spirality, and the helix that spirals up from conical base to cone tip is more and more intensive; Described spiral cutter head is fixed on the upper side of described hollow bushing; The empty spiral lamination of thread is arranged at the bottom of described spiral lamination hollow bushing; Described chamfered studs can be free to slide in the empty spiral lamination gap of thread, and described slant nut is stuck in spiral lamination hollow bushing, prevents described postbrachium from coming off; Described forearm and described postbrachium hinged; Described inclined-plane cutter head and described front armed lever hinged.
The present invention can also be such: the empty spiral lamination of the described thread helix that spirals up from is down more and more intensive.
The present invention can also be such: described chamfered studs and described slant nut are positioned at one end of rear armed lever, and can freely rotate, and one end of described rear wall bar is the angle of inclined-plane and its axis is 25.6 degree; Described slant nut bottom surface is the angle of inclined-plane and its axis is 25.6 degree.
The present invention can also be such: described groove is positioned at the both sides of described hollow bushing; The shape that described groove is positioned at described hollow bushing open end portion is rectangular recess, and the described groove other end is a side is wedge shape, and front is the groove of rectangle, and connects rectangular recess by an inclined-plane; And to be the groove of wedge shape darker than rectangular recess in side.
The present invention can also be such: described postbrachium and front armed lever are made up of stainless steel; Described spiral lamination hollow bushing and described hollow bushing made of aluminum.
The present invention can also be such: the shape of described groove dop is rectangular recess, and can embed in described groove.
The present invention can also be such: the cross sectional shape of described spiral cutter head is wedge shape, and is made up of high strength chromium steel.
The present invention can also be such: the shape of described spiral knife face termination is semi-circular recesses, and is connected with described spiral knife face one.
The present invention can also be such: described inclined-plane cutter head comprises cutter head curved surface, link bolt; The upside of cutter head curved surface and right side are the knife edge, thinner than on the downside of it and left side, and are made up of high strength chromium steel.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the structural representation of spiral cutter head of the present invention and hollow bushing.
Fig. 3 is the cross-sectional view of spiral cutter head of the present invention.
Fig. 4 is the structural representation of spiral lamination hollow bushing of the present invention.
Fig. 5 is the structural representation of forearm of the present invention.
Fig. 6 is the structural representation of postbrachium of the present invention.
Fig. 7 is the front view of inclined-plane of the present invention cutter head.
Fig. 8 is the left view of inclined-plane of the present invention cutter head.
Described in detailed description of the invention
See Fig. 1-8, the present invention is a kind of instrument of pruning paintbrush of improvement, comprises spiral cutter head 1, spiral lamination hollow bushing 2, forearm 3, postbrachium 4, hollow bushing 5; Spiral cutter head 1 comprises spiral knife face 1.1, spiral knife face termination 1.2; Spiral lamination hollow bushing 2 comprises groove dop 2.1, the empty spiral lamination 2.2 of thread; Forearm 3 comprises front armed lever 3.1, inclined-plane cutter head 3.2, link bolt hole 3.3; Postbrachium 4 comprises rear armed lever 4.1, chamfered studs 4.2, slant nut 4.3; Hollow bushing 5 comprises groove 5.1, hollow bushing body 5.2.
Using method:
Step 1, inserts the groove 5.1 of hollow bushing 5 and slides into the bottom of groove 5.1 by the groove dop 2.1 of spiral lamination hollow bushing 2, in the groove of namely wedge shape.
Step 2, then by the nib of paintbrush down through spiral lamination hollow bushing 2 and hollow bushing 5, the pen hair part of nib is directly inserted in spiral cutter head 1, and paintbrush bends and will be pressed against outside spiral cutter head 1 with the pen hair of bifurcated.
Step 3, the angle of adjustment forearm 3, postbrachium 4, inclined-plane cutter head 3.2, chamfered studs 4.2 can be free to slide in empty spiral lamination 2.2 gap of thread, and slant nut 4.3 is stuck in spiral lamination hollow bushing, prevents postbrachium 4 from coming off; Time such inclined-plane cutter head 3.2 also slides along the helicoid of spiral knife face 1.1 and spiral knife face termination 1.2, paintbrush outside spiral cutter head 1 bends and the pen hair of bifurcated is just in time between spiral cutter head 1 and inclined-plane cutter head 3.2, just define the effect of similar scissors, the pen hair of the unnecessary bending and bifurcated of paintbrush can be pruned.
See Fig. 2 and Fig. 4, the groove 5.1 of hollow bushing 5 is positioned at the both sides of hollow bushing 5; The shape that groove 5.1 is positioned at hollow bushing 5 open end portion is rectangular recess, and the shape of groove dop 2.1 is rectangular recess, and can embed in groove 5.1, spiral lamination hollow bushing 2 and hollow bushing 5 made of aluminum.The groove dop 2.1 of spiral lamination hollow bushing 2 inserts in the groove of the wedge shape of the groove 5.1 of hollow bushing 5, groove dop 2.1 and groove 5.1 is engaged mutually, fixes hollow bushing 5 and spiral lamination hollow bushing 2.
See Fig. 2 and Fig. 4, groove 5.1 other end is a side is wedge shape, and front is the groove of rectangle, and connects rectangular recess by an inclined-plane; And to be the groove of wedge shape darker than rectangular recess in side, make groove dop 2.1 be not easy to skid off groove 5.1, reach the effect fixing hollow bushing 5 and spiral lamination hollow bushing 2.If when needing to be separated hollow bushing 5 and spiral lamination hollow bushing 2, as long as exert oneself a little, groove dop 2.1 can skid off groove 5.1 along the inclined-plane connecting rectangular recess, has so just been separated hollow bushing 5 and spiral lamination hollow bushing 2.
See Fig. 1, spiral cutter head 1 is fixed on the upper side of hollow bushing 5; Model due to paintbrush has a variety of, and thickness and size are all different, and the number of turns of the corresponding size of radius of turn of spiral cutter head 1, the width of the knife face of spiral cutter head 1 and spiral rotating is all different.So the present invention is typically equipped with the spiral cutter head 1 being fixed on hollow bushing 5 of several different model, when needing that spiral cutter head 1, only need the groove dop 2.1 of spiral lamination hollow bushing 2 to insert in the groove of the wedge shape of the groove 5.1 of the hollow bushing 5 of this model spiral cutter head 1.
Spiral cutter head 1 has used for a long time and also can wear and tear in addition, needs to change.Do not need the instrument changing whole pruning paintbrush during replacing, only need to change spiral cutter head 1 and hollow bushing 5, can economize on resources like this, avoid unnecessary waste.
If need to change, as long as the groove dop 2.1 of spiral lamination hollow bushing 2 is skidded off in the groove of the wedge shape of the groove 5.1 of hollow bushing 5.
See Fig. 1, chamfered studs 4.2 can be free to slide in empty spiral lamination 2.2 gap of thread, and slant nut 4.3 is stuck in spiral lamination hollow bushing, prevents postbrachium 4 from coming off; Forearm 3 and postbrachium 4 hinged; Inclined-plane cutter head 3.2 is hinged with front armed lever 3.1.Model due to paintbrush has a variety of, thickness and size are all different, forearm 3, postbrachium 4, angle between inclined-plane cutter head 3.2 and front armed lever 3.1 can be adjusted like this, inclined-plane cutter head 3.2 can be slided with the helicoid of suitable angle along spiral knife face 1.1.
See Fig. 1 and Fig. 6, the empty spiral lamination 2.2 of thread is arranged at the bottom of spiral lamination hollow bushing 2; Chamfered studs 4.2 can be free to slide in empty spiral lamination 2.2 gap of thread, and slant nut 4.3 is stuck in spiral lamination hollow bushing, prevents postbrachium 4 from coming off; Chamfered studs 4.2 and slant nut 4.3 are positioned at one end of rear armed lever 4.1, and can freely rotate, and increase the sliding capability of chamfered studs 4.2.One end of rear wall bar 4.1 is the angle of inclined-plane and its axis is 25.6 degree; Slant nut 4.3 bottom surface is the angle of inclined-plane and its axis is 25.6 degree, and this angle is through many experiments and draws to obtain preferred angle.
See Fig. 3, the cross sectional shape of spiral knife face 1.1 is wedge shape, and the similar shearing blade of wedge shape, one end is wide, and one end is narrow.Inclined-plane cutter head 3.2 along spiral knife face 1.1 helicoid slide time, just define the effect of similar scissors, paintbrush can be repaired and bend the pen hair with bifurcated.
In order to extend the service life of inclined-plane cutter head 3.2 and spiral cutter head 1, increase its intensity, inclined-plane cutter head 3.2 and spiral cutter head 1 are made up of high strength chromium steel.
Due to paintbrush use time, that is more wear and tear more serious close to nib, according to this feature, see Fig. 2 and Fig. 4, spiral cutter head 1 is a conical spirality, and the helix that spirals up from conical base to cone tip is more and more intensive, so more to the part of nib, more can prune careful.Same, the chamfered studs 4.2 connecting the postbrachium of spiral cutter head 1 along empty spiral lamination 2.2 gap of thread in track, namely the empty spiral lamination 2.2 of the thread helix that spirals up from is down more and more intensive.
See Fig. 3, the part of brush tip will have the vigour of style in writing of certain length to use the people of paintbrush all to know, it is just handy to use, and therefore the shape of spiral knife face termination 1.2 is semi-circular recesses, and is connected with spiral knife face 1.1 one.The length of semi-circular recesses sets according to the pen of different model.
The cutter head curved surface 3.2.1 of inclined-plane cutter head 3.2,3.2.2,3.2.3, in order to coordinate the preferred angle of spiral cutter head 1, make pruning more agile.See Fig. 7 and Fig. 8, inclined-plane cutter head 3.2 comprises cutter head curved surface 3.2.1,3.2.2,3.2.3, link bolt 3.2.3; The upside of cutter head curved surface 3.2.1 and right side are the knife edge, thinner than on the downside of it and left side.
The present invention can also be such: postbrachium and front armed lever 3.1 are made up of stainless steel.
The present invention provides a kind of new technical scheme the service life of pruning paintbrush and prolongation paintbrush.
Claims (1)
1. the pruning paintbrush tool with spiral cutter head, is characterized in that: comprise spiral cutter head (1), spiral lamination hollow bushing (2), forearm (3), postbrachium (4), hollow bushing (5); Described spiral cutter head (1) comprises spiral knife face (1.1), spiral knife face termination (1.2); Described spiral lamination hollow bushing (2) comprises groove dop (2.1), the empty spiral lamination of thread (2.2); Described forearm (3) comprises front armed lever (3.1), inclined-plane cutter head (3.2), link bolt hole (3.3); Described postbrachium (4) comprises rear armed lever (4.1), chamfered studs (4.2), slant nut (4.3); Described hollow bushing (5) comprises groove (5.1), hollow bushing body (5.2); Described spiral cutter head (1) is a conical spirality, and the helix that spirals up from conical base to cone tip is more and more intensive; Described spiral cutter head (1) is fixed on the upper side of described hollow bushing (5); The empty spiral lamination of thread (2.2) is arranged at the bottom of described spiral lamination hollow bushing (2); Described chamfered studs (4.2) can be free to slide in thread empty spiral lamination (2.2) gap, and described slant nut (4.3) is stuck in spiral lamination hollow bushing, prevents described postbrachium (4) from coming off; Described forearm (3) and described postbrachium (4) hinged; Described inclined-plane cutter head (3.2) is hinged with described front armed lever (3.1); The empty spiral lamination (2.2) of the described thread helix that spirals up from is down more and more intensive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510641428.9A CN105365473B (en) | 2013-11-12 | 2013-11-12 | A kind of trimming paintbrush tool with spiral cutter head |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510641428.9A CN105365473B (en) | 2013-11-12 | 2013-11-12 | A kind of trimming paintbrush tool with spiral cutter head |
| CN201310558553.4A CN103538422B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument of pruning paintbrush of improvement |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310558553.4A Division CN103538422B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument of pruning paintbrush of improvement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105365473A true CN105365473A (en) | 2016-03-02 |
| CN105365473B CN105365473B (en) | 2017-11-24 |
Family
ID=49962437
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510641428.9A Active CN105365473B (en) | 2013-11-12 | 2013-11-12 | A kind of trimming paintbrush tool with spiral cutter head |
| CN201510641387.3A Active CN105196780B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument for trimming paintbrush |
| CN201310558553.4A Expired - Fee Related CN103538422B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument of pruning paintbrush of improvement |
| CN201510641369.5A Active CN105216536B (en) | 2013-11-12 | 2013-11-12 | A kind of maintenance instrument of paintbrush |
| CN201510639922.1A Active CN105109265B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument for the service life for extending paintbrush |
Family Applications After (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510641387.3A Active CN105196780B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument for trimming paintbrush |
| CN201310558553.4A Expired - Fee Related CN103538422B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument of pruning paintbrush of improvement |
| CN201510641369.5A Active CN105216536B (en) | 2013-11-12 | 2013-11-12 | A kind of maintenance instrument of paintbrush |
| CN201510639922.1A Active CN105109265B (en) | 2013-11-12 | 2013-11-12 | A kind of instrument for the service life for extending paintbrush |
Country Status (1)
| Country | Link |
|---|---|
| CN (5) | CN105365473B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3739789A (en) * | 1972-06-12 | 1973-06-19 | Pfizer | Brush applicator |
| CN2157061Y (en) * | 1993-01-27 | 1994-02-23 | 杨振林 | Art knife with automatic blade replacing means |
| CN2602946Y (en) * | 2003-01-27 | 2004-02-11 | 庞玉栋 | Cutter head replaceable, portable seal cutter |
| CN2619804Y (en) * | 2003-03-11 | 2004-06-09 | 潘德苗 | Art designing knife with changeable blade |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58194598A (en) * | 1982-05-10 | 1983-11-12 | 小国 晃 | Spiral pencil sharpener |
| US4917521A (en) * | 1989-02-15 | 1990-04-17 | Lai Kung Chung | Pen type container for correction fluid with daubing function |
| CN2115905U (en) * | 1991-10-23 | 1992-09-16 | 周岩峰 | Cone screw pen-knife |
| CN2218662Y (en) * | 1994-11-30 | 1996-01-31 | 江太成 | Sharpener for pencil |
| US5542144A (en) * | 1995-04-19 | 1996-08-06 | Forsline; Ladd B. | Silicone paint brush artist's tool |
| CN2271969Y (en) * | 1996-12-20 | 1998-01-07 | 浙江大学 | Electric pencil sharpener with helical hob |
| CN201158049Y (en) * | 2007-11-02 | 2008-12-03 | 周益 | Helical electric razor |
| CN203511137U (en) * | 2013-11-12 | 2014-04-02 | 邹珺 | Improved paintbrush trimming tool |
-
2013
- 2013-11-12 CN CN201510641428.9A patent/CN105365473B/en active Active
- 2013-11-12 CN CN201510641387.3A patent/CN105196780B/en active Active
- 2013-11-12 CN CN201310558553.4A patent/CN103538422B/en not_active Expired - Fee Related
- 2013-11-12 CN CN201510641369.5A patent/CN105216536B/en active Active
- 2013-11-12 CN CN201510639922.1A patent/CN105109265B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3739789A (en) * | 1972-06-12 | 1973-06-19 | Pfizer | Brush applicator |
| CN2157061Y (en) * | 1993-01-27 | 1994-02-23 | 杨振林 | Art knife with automatic blade replacing means |
| CN2602946Y (en) * | 2003-01-27 | 2004-02-11 | 庞玉栋 | Cutter head replaceable, portable seal cutter |
| CN2619804Y (en) * | 2003-03-11 | 2004-06-09 | 潘德苗 | Art designing knife with changeable blade |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103538422A (en) | 2014-01-29 |
| CN105109265A (en) | 2015-12-02 |
| CN105365473B (en) | 2017-11-24 |
| CN105216536B (en) | 2017-10-31 |
| CN103538422B (en) | 2016-02-17 |
| CN105109265B (en) | 2017-12-05 |
| CN105196780B (en) | 2017-11-14 |
| CN105196780A (en) | 2015-12-30 |
| CN105216536A (en) | 2016-01-06 |
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Inventor after: Zhang Siyin Inventor before: The inventor has waived the right to be mentioned |
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Effective date of registration: 20171031 Address after: 211100, Jiangsu province Nanjing Jiangning Qilin Technology Innovation Park wisdom road No. 300 Applicant after: Nanjing Xu Rui Rui Mstar Technology Ltd Address before: 330095 Jiangxi Province, Nanchang Qingshan Lake Road No. 1698 Nanjing Fengyuan domain two days building 2 unit 302 room 4 Applicant before: Zou Jun |
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Effective date of registration: 20190103 Address after: 226321 Diwei Town Industrial Park, Tongzhou District, Nantong City, Jiangsu Province Patentee after: Nantong Hengqu New Materials Co., Ltd. Address before: 211100 300 Chi Hui Road, Qilin science and Technology Innovation Park, Jiangning District, Nanjing, Jiangsu Patentee before: Nanjing Xu Rui Rui Mstar Technology Ltd |
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Effective date of registration: 20190115 Address after: 200120 Pudong New Area, Shanghai, China (Shanghai) free trade trial area, No. 3, 1 1, Fang Chun road. Patentee after: Shanghai set up Mdt InfoTech Ltd Address before: 226321 Diwei Town Industrial Park, Tongzhou District, Nantong City, Jiangsu Province Patentee before: Nantong Hengqu New Materials Co., Ltd. |
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Effective date of registration: 20190925 Address after: Room 1602, B1 Floor, Lijinxiu Jiangnan (West District), east of Gouyun Road, north of Yinhe No. 2 Road, Suzhou City, Anhui Province Patentee after: Suzhou Huiteng Intellectual Property Consulting Co., Ltd. Address before: 200120 Shanghai City, Pudong New Area Chinese (Shanghai) free trade zone fanchun Road No. 400 Building 1 layer 3 Patentee before: Shanghai set up Mdt InfoTech Ltd |
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