WO2018065496A1 - Sicherheitselement und wertdokument mit diesem sicherheitselement - Google Patents
Sicherheitselement und wertdokument mit diesem sicherheitselement Download PDFInfo
- Publication number
- WO2018065496A1 WO2018065496A1 PCT/EP2017/075264 EP2017075264W WO2018065496A1 WO 2018065496 A1 WO2018065496 A1 WO 2018065496A1 EP 2017075264 W EP2017075264 W EP 2017075264W WO 2018065496 A1 WO2018065496 A1 WO 2018065496A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- security element
- layer
- opacity
- element according
- luminescent
- Prior art date
Links
- 230000000007 visual effect Effects 0.000 claims abstract description 13
- 230000005855 radiation Effects 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 40
- 239000000758 substrate Substances 0.000 claims description 15
- 239000013047 polymeric layer Substances 0.000 claims description 11
- 239000004922 lacquer Substances 0.000 claims description 10
- 239000012790 adhesive layer Substances 0.000 claims description 3
- 239000003086 colorant Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000004920 heat-sealing lacquer Substances 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002508 contact lithography Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003847 radiation curing Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
- B42D25/387—Special inks absorbing or reflecting ultraviolet light
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/355—Security threads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
- B42D25/21—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose for multiple purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/328—Diffraction gratings; Holograms
Definitions
- the invention relates to a value document and a security element in the form of a strip having a first and second polymeric layer and with a luminescent under UV radiation, visually recognizable raster print image between the first and second layer, wherein the raster print image has an opacity and at least one printing surface with a Boundary contour within the security element is formed.
- the invention has therefore set itself the task, starting from the above-described prior art, to increase the security against counterfeiting of a security element with a luminescent imprint.
- the invention achieves the stated object in that at least one of the two polymer layers has an opacity at least in the region of the boundary contour of the imprint area and is adapted in its opacity to the opacity of the imprint area in order to increase the visual perceptibility of the boundary contour of the imprint. attenuate pressure surface of the luminescent halftone printed image on the security element.
- At least one of the two polymer layers has an opacity in the region of the boundary contour of the imprint area, in particular over the entire area, and is adapted in its opacity to the opacity of the imprint area, in order to reduce the visual perceptibility of the boundary contour of the imprint area of the luminescent halftone image on the security element to a great extent counterfeit-proof security feature on the security element to be created - not least because of the increased manufacturing effort. Furthermore, it is thus possible to provide a security element with a hidden security feature, which security feature does not change the general appearance of the security element under certain conditions.
- the boundary contour of this luminescent imprint can be attenuated or concealed relative to the security element such that the visual recognizability of the imprint, especially under white light, is not or hardly possible - but visually easily recognizable, for example, under UV light irradiation.
- a visually easily recognizable imprint can already provide an indication with respect to a security feature, causing a security feature - which is under certain conditions, especially in white light, not recognizable or difficult recognizable - less attention to the security element according to the invention, which in turn can significantly contribute to the improvement of a proof of authenticity and subsequently the security against counterfeiting.
- halftone print image can be understood to mean a printed image with a print pattern in which the halftone dots or printing dots can be applied next to and above one another.
- Raster print images can represent single or multi-color images.
- a printing ink containing luminescent dyes or pigments can be used for this UV-luminescent print.
- luminescent dye and / or luminescent pigment can, for example under the action of radiation, be brought into an energetically excited state and then spontaneously pass into a state of lower energy - whereby photons of a certain wavelength are emitted, which is perceptible by the human eye at the appropriate wavelength ,
- the luminescent imprint and / or the halftone image can be printed by any conventional, for example, contact or non-contact printing method, such as gravure, screen, pad, offset, lithographic, flexographic, high-pressure or inkjet. Printing method, etc. can be applied.
- the opacity of the polymeric layers is understood as the opacity in the wavelength range of visible light.
- the opacity values of the halftone printed image and of at least one of the polymeric layers are substantially the same, a stable and particularly simple and cost-effective visual masking of the boundary contour of the luminescent imprint can be achieved. If the opacity values of the halftone printed image and of the second polymeric layers are substantially the same, or in particular adapted to one another, it can be ensured in a simple manner that the advantages according to the invention are likewise easily achieved in those areas in which no halftone printed image is arranged above the second layer.
- the visual recognizability of the boundary contour of the imprint area of the luminescent halftone printed image on the security element can be detected particularly reliably. be weakens when a diffusely scattering paint layer forms the first layer.
- a matt lacquer layer can be distinguished.
- Such a diffusely scattering lacquer layer can namely steadily compensate for different opacities on the security element and thus ensure a desired, above all homogeneous, appearance of the security element.
- a particularly tamper-proof security element is to be provided in this way.
- the security element can be embedded particularly advantageously in a value document if the first layer can be printed.
- the security element can be protected from external influences and at the same time be provided on a valuable document or on any carrier in a manner that are easy to handle. In particular, this can prevent oxidation of the fluorescent dyes of the luminescent imprint. According to the invention, such a particularly robust and stable security element can be created.
- the adhesive layer may in particular comprise a heat-sealable or a cold seal adhesive.
- the second layer may also have a self-adhesive coating, a radiation-curing coating or other comparable coatings.
- the second layer can also be translucent.
- a particularly easy to handle and also stable security element can be created, since the second layer does not affect the visual appearance of the security element and thus its security features.
- the raster print image has luminescent screen dots in different colors, a multicolor luminescent print can be created in a structurally simple manner. This multi-color luminescent imprint can even be made real-colored if red and / or green and / or blue luminescent screen dots are used.
- a particularly tamper-proof security feature on the luminescent imprint can be created if the raster print image has a honeycomb grid.
- honeycomb grid has hexagonal grid cells which consist of juxtaposed triangular grid points, then the security against forgery of the security feature can be further improved - in particular if the grid points adjoin one another.
- each grid cell in each case has two grid points which have the same luminescent color, the luminescence intensity and the color reproduction of the luminescent print can be made particularly homogeneous.
- the color impression of the raster cell is formed as a function of missing raster points, the variation of the color rendition and the luminescence intensity within the raster print image can be achieved in a structurally simple manner.
- the security element can be distinguished when the color impression of the screen cell is formed as a function of the size of the screen dots.
- a particularly homogeneous raster print image can be created - which in turn can be beneficial to the security against forgery of the security element.
- the halftone dots of the raster print image have a size of 10 to 500 ⁇ , in particular from 50 to 200 ⁇ on.
- the security against forgery of the security element can be further improved if an embossed diffraction structure and a metallization adjoining this diffraction structure are provided between the first and second layer.
- the embossed diffraction structure can cooperate in particular with the subsequent metallization in order to form a reflection hologram.
- such a reflection hologram may be selectively mounted in the viewing direction above or below the luminescent imprint. If the reflection hologram is provided over the imprint, the visual recognizability of the imprint must be ensured by means of corresponding recesses in the reflection hologram.
- the security against forgery of the security element can be further increased if it has machine-readable security features, in particular with magnetic properties, for example in the form of a magnetic strip. It is also conceivable that such magnetic properties are provided in combination with a hologram.
- the security element has a thickness of less than or equal to 30 ⁇ , in particular of less than or equal to 25 ⁇ .
- a virtually collection-free embedding of the security element in a substrate or value document is possible.
- the security element according to the invention can bring its advantages in particular if it is provided on a substrate of a document of value - thus connected to it.
- a value document for example, a bank note, a tax stamp, passport, driver's license or identity card and so on.
- value documents can be distinguished in this regard which have a security element according to the invention which extends continuously from one edge of the substrate to the opposite edge of the substrate.
- a security element according to the invention which extends continuously from one edge of the substrate to the opposite edge of the substrate.
- These may be strip, thread or tape-shaped security elements.
- the security against forgery of the value document can be further improved if the surfaces of the first layer of the security element and of the value document are essentially identical in their haptic properties and / or in their visual appearance.
- a visually recognizable difference in opacity between substrate and luminescent imprint can be avoided - which, when viewed under white light, can hide this steadily in the value document.
- a printable matte lacquer layer on the security element may be particularly distinguished.
- FIG. 1 shows a sectional view through a value document with a security element according to a first embodiment variant
- FIG. 2 shows a sectional view through a value document with a security element according to a second embodiment
- FIG. 3 is a plan view of the security element of FIG. 2.
- a security element 100 which has a first polymeric layer 1 and a second polymeric layer 2, which are applied to a carrier substrate 10, in particular a carrier film.
- a carrier substrate 10 between the first and second polymeric layer 1, 2 is a luminescent under UV radiation of the, an opacity exhibiting raster print image 3 arranged on the carrier substrate 10, which forms at least one delimited by a boundary contour 4 printing surface 5 on the security element 100 as a security feature.
- the raster print image 3 is visually recognizable.
- the raster printed image 3 can in particular have a higher opacity compared to the unprinted area, or be opaque.
- the first polymeric layer 1 and / or the second polymeric layer 2 are preferably adjusted in their opacity to the opacity of the imprint area 5 in areas of the boundary contour 4 of the imprint area 5, but in particular over their entire area, in order to ensure visual recognition to mitigate the boundary contour 4 of the imprint area 5.
- the luminescent halftone printed image 3 is therefore hidden in the security element 100 when viewed under white light.
- the conditions under which the halftone printing image 3 is hidden or visible may of course be varied as needed.
- the first polymeric layer 1 is formed by a diffusely scattering matt lacquer layer 6.
- This ensures the advantages according to the invention with respect to the boundary contour 4 - but can also be distinguished by adapting the overall appearance of the security element 100 to that of the value document 200.
- the first layer 1, in particular in the form of the matt lacquer layer 6, can be printed easily and can thus be embedded in a value document in a particularly forgery-proof manner.
- the first layer 1 of the security element 100 is visually adapted to the surface texture of the value document 200 or to the substrate 21 of the value document 200 - which may also be considered with regard to the haptic properties.
- the second layer 2 is formed in the example shown in FIG. 1 as a translucent heat sealing lacquer layer 8.
- a protective lacquer 7 is applied over the heat sealing lacquer 8 in order to protect the luminescent dyes contained in the halftone printed image 3 from oxidation.
- the opacity of the halftone printing image 3 and the second polymeric layer 2 may be substantially the same, whereby the visual recognizability of the boundary contour 4 can be particularly easily reduced.
- the raster print image 3 of the security element 100 has, as can be seen from the top view in FIG. 3, red, green and blue luminescent screen dots 1 1, 12 and 13.
- the grid points 1 1, 12, 13 are arranged in such a honeycomb grid 14 of the raster print image 3, that each of the hexagonal grid cells 15 of the honeycomb grid 14 each six juxtaposed and adjoining grid points 1 1, the twelfth , 13.
- Each grid cell 15 shows two red-luminescent halftone dots 1 1, two green-luminescent halftone dots 12 and two blue-luminescent halftone dots 13.
- the differently colored halftone dots 1 1, 12, 13 are each arranged alternately in color, and have a size of 10 to 500 ⁇ , in particular from 50 to 200 ⁇ on.
- FIG. 2 shows a security element 101, an embossing lacquer layer 17 having an embossed diffraction structure 18 being provided between the first layer 1 and the second layer 2.
- a partial metallization 19 is applied to the embossing lacquer layer 17 as a reflection layer in order to cooperate with the embossed diffraction structure 18 to form a reflection hologram 20.
- the reflection hologram 20 may be partially provided on the security element 101 in the form of stripes, characters or patterns.
- the security elements according to the invention 100, 101 have a thickness of less than or equal to 30 ⁇ , in particular of less than or equal to 25 ⁇ on.
- Value documents 200, 201 are shown in FIG. 1 and FIG. 2, wherein a security element 100 or 101 is respectively applied to the substrate 21 of the value document 200, 201.
- the value documents 200, 201 may be a banknote, a driver's license, an identity card, a passport or similar.
- the security elements 100, 101 can thereby extend from one edge of the substrate to the opposite edge of the substrate 21, in particular in the form of a band or a strip, but this has not been shown in detail in the figures.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2019515936A JP7092751B2 (ja) | 2016-10-04 | 2017-10-04 | 安全要素及び安全要素を備えた有価文書 |
BR112019006649-7A BR112019006649B1 (pt) | 2016-10-04 | 2017-10-04 | Elemento de segurança e documento de valor |
RU2019112840A RU2741590C2 (ru) | 2016-10-04 | 2017-10-04 | Защитный элемент и ценный документ с этим защитным элементом |
CA3038600A CA3038600A1 (en) | 2016-10-04 | 2017-10-04 | Security element and value document having this security element |
MYPI2019001841A MY196899A (en) | 2016-10-04 | 2017-10-04 | Security element and value document having said security element |
CN201780060508.2A CN110062702B (zh) | 2016-10-04 | 2017-10-04 | 安全元件和具有该安全元件的有价文件 |
US16/339,351 US11117414B2 (en) | 2016-10-04 | 2017-10-04 | Security element and value document having this security element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16192287.7 | 2016-10-04 | ||
EP16192287.7A EP3305543B1 (de) | 2016-10-04 | 2016-10-04 | Sicherheitselement und wertdokument mit diesem sicherheitselement |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2018065496A1 true WO2018065496A1 (de) | 2018-04-12 |
Family
ID=57123843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2017/075264 WO2018065496A1 (de) | 2016-10-04 | 2017-10-04 | Sicherheitselement und wertdokument mit diesem sicherheitselement |
Country Status (12)
Country | Link |
---|---|
US (1) | US11117414B2 (de) |
EP (1) | EP3305543B1 (de) |
JP (1) | JP7092751B2 (de) |
CN (1) | CN110062702B (de) |
CA (1) | CA3038600A1 (de) |
ES (1) | ES2751710T3 (de) |
HU (1) | HUE046101T2 (de) |
MY (1) | MY196899A (de) |
PL (1) | PL3305543T3 (de) |
RU (1) | RU2741590C2 (de) |
SI (1) | SI3305543T1 (de) |
WO (1) | WO2018065496A1 (de) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1241022A1 (de) | 1989-09-28 | 2002-09-18 | GAO Gesellschaft für Automation und Organisation mbH | Datenträger mit einem optisch variablen Element und Verfahren zu seiner Herstellung |
WO2015095976A1 (en) * | 2013-12-23 | 2015-07-02 | Orell Füssli Sicherheitsdruck Ag | Security device for security document |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56564U (de) * | 1979-06-15 | 1981-01-06 | ||
CA2471457C (en) * | 2001-12-24 | 2011-08-02 | Digimarc Id Systems, Llc | Covert variable information on id documents and methods of making same |
US7258915B2 (en) * | 2003-08-14 | 2007-08-21 | Jds Uniphase Corporation | Flake for covert security applications |
JP4487090B2 (ja) * | 2005-01-13 | 2010-06-23 | 独立行政法人 国立印刷局 | 真偽判別可能な発光印刷物 |
JP4079449B2 (ja) * | 2006-08-21 | 2008-04-23 | 共同印刷株式会社 | 隠蔽カードの製造方法 |
DE102007057658A1 (de) * | 2007-02-07 | 2009-06-04 | Leonhard Kurz Stiftung & Co. Kg | Sicherheitselement |
DE102007052176B3 (de) * | 2007-10-30 | 2009-02-05 | Ovd Kinegram Ag | Sicherheitsdokument sowie Verfahren zu seiner Herstellung |
ITMI20080053A1 (it) * | 2008-01-15 | 2009-07-16 | Fabriano Securities Srl | Elemento di sicurezza, particolarmente per banconote, carte di sicurezza e simili, avente caratteristiche anti-contraffazione. |
DE102008062149B3 (de) * | 2008-12-16 | 2010-04-29 | Ovd Kinegram Ag | Verfahren zur Herstellung eines Sicherheitselements sowie Transferfolie |
JP5757379B2 (ja) * | 2010-01-29 | 2015-07-29 | 株式会社吉野工業所 | 多重壁構造体 |
JP2013063611A (ja) * | 2011-09-20 | 2013-04-11 | Dainippon Screen Mfg Co Ltd | 画像記録装置、画像記録方法および画像記録物 |
JP6040540B2 (ja) * | 2012-03-07 | 2016-12-07 | 大日本印刷株式会社 | 記録媒体、転写箔及び記録媒体の製造方法 |
DE102012111054B4 (de) * | 2012-11-16 | 2023-10-19 | Bundesdruckerei Gmbh | Sicherheitselement für ein Wert- und/oder Sicherheitsdokument |
FR3005068B1 (fr) * | 2013-04-26 | 2017-05-26 | Arjowiggins Security | Element de securite comportant un hologramme en volume. |
EP3034318A1 (de) * | 2014-12-18 | 2016-06-22 | Gemalto SA | Personalisierung von physischen Medien mittels selektiver Aufdeckung und Verdeckung von vorgedruckten Farbpixeln |
-
2016
- 2016-10-04 HU HUE16192287A patent/HUE046101T2/hu unknown
- 2016-10-04 SI SI201630460T patent/SI3305543T1/sl unknown
- 2016-10-04 ES ES16192287T patent/ES2751710T3/es active Active
- 2016-10-04 PL PL16192287T patent/PL3305543T3/pl unknown
- 2016-10-04 EP EP16192287.7A patent/EP3305543B1/de active Active
-
2017
- 2017-10-04 RU RU2019112840A patent/RU2741590C2/ru active
- 2017-10-04 JP JP2019515936A patent/JP7092751B2/ja active Active
- 2017-10-04 US US16/339,351 patent/US11117414B2/en active Active
- 2017-10-04 CA CA3038600A patent/CA3038600A1/en active Pending
- 2017-10-04 WO PCT/EP2017/075264 patent/WO2018065496A1/de active Application Filing
- 2017-10-04 MY MYPI2019001841A patent/MY196899A/en unknown
- 2017-10-04 CN CN201780060508.2A patent/CN110062702B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1241022A1 (de) | 1989-09-28 | 2002-09-18 | GAO Gesellschaft für Automation und Organisation mbH | Datenträger mit einem optisch variablen Element und Verfahren zu seiner Herstellung |
WO2015095976A1 (en) * | 2013-12-23 | 2015-07-02 | Orell Füssli Sicherheitsdruck Ag | Security device for security document |
Also Published As
Publication number | Publication date |
---|---|
HUE046101T2 (hu) | 2020-02-28 |
RU2019112840A3 (de) | 2020-11-26 |
PL3305543T3 (pl) | 2020-05-18 |
SI3305543T1 (sl) | 2019-12-31 |
EP3305543A1 (de) | 2018-04-11 |
JP2019536656A (ja) | 2019-12-19 |
ES2751710T3 (es) | 2020-04-01 |
EP3305543B1 (de) | 2019-07-31 |
RU2019112840A (ru) | 2020-11-06 |
MY196899A (en) | 2023-05-09 |
RU2741590C2 (ru) | 2021-01-27 |
CA3038600A1 (en) | 2018-04-12 |
US11117414B2 (en) | 2021-09-14 |
BR112019006649A2 (pt) | 2019-07-02 |
JP7092751B2 (ja) | 2022-06-28 |
US20200047538A1 (en) | 2020-02-13 |
CN110062702A (zh) | 2019-07-26 |
CN110062702B (zh) | 2021-10-26 |
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