EP2694296A1 - Optisch variables sicherheitsmerkmal - Google Patents
Optisch variables sicherheitsmerkmalInfo
- Publication number
- EP2694296A1 EP2694296A1 EP12714619.9A EP12714619A EP2694296A1 EP 2694296 A1 EP2694296 A1 EP 2694296A1 EP 12714619 A EP12714619 A EP 12714619A EP 2694296 A1 EP2694296 A1 EP 2694296A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- line structure
- line
- lines
- raised
- 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
- 238000007639 printing Methods 0.000 claims abstract description 91
- 230000000694 effects Effects 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 13
- 239000000049 pigment Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 16
- 239000002966 varnish Substances 0.000 claims 2
- 239000000976 ink Substances 0.000 abstract description 27
- 239000003086 colorant Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000003854 Surface Print Methods 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000007 visual 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
-
- 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
- B42D15/00—Printed matter of special format or style not otherwise provided for
- B42D15/0073—Printed matter of special format or style not otherwise provided for characterised by shape or material of the sheets
-
- 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
- B42D25/29—Securities; Bank notes
-
- 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
- B42D25/324—Reliefs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
- B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
Definitions
- the present invention relates to a printed product with a security element and to a method for producing such a printed product with a security element.
- the invention relates to the production of a printed product with a forgery-proof optical element that can not possibly be copied by a supposed counterfeiter without the copy being recognizable.
- the copy is a product used in a safety-related field, such as a spare part for a vehicle brake or the like, then the purchaser of such an inferior copy will also be at considerable risk for injury Life.
- Such an optical security feature is, for example, a hologram applied to a product or to the packaging of a product.
- holograms are on the one hand relatively expensive to manufacture.
- a supposed counterfeiter it would also be possible for a supposed counterfeiter to get access to a certain amount of such holograms, which he can then apply to his copies.
- Another optically easily perceived security feature is a so-called "latent image”.
- This is understood in this context as a security technology applied by printing technology, which, depending on the orientation of the viewing angle and the incidence of light, results in a different visual impression.
- a relief-like surface structure is simultaneously produced by a printing process, preferably a gravure printing, in addition to the ink application.
- areas with a multiplicity of parallel lines are created in the relief, and there are basically two different types of areas that differ in the orientation of the lines running in parallel.
- the lines of one area are perpendicular to the lines of the other area.
- one or the other area appears brighter. If the orientation of this latent image is changed, this effect is reversed and the originally bright area suddenly becomes the darker area.
- the difference in brightness results from the different shadows cast by the line structures aligned transversely to the incidence of light.
- a printed product with an optical security feature which comprises a printing material on which a first line structure of a plurality of raised, parallel lines, which are applied in a printing process on the substrate. Furthermore, a second line structure of a plurality of raised, mutually parallel lines is applied to the substrate. The second line structure is applied to the substrate in a printing process and has a different orientation from the first line structure. At least the printing ink for the printing of the first line structure contains color pigments with a tilting surface. fect.
- the stated object is also achieved by a method for producing a printed product with an optical security feature, which initially provides a printing material.
- a first line structure of a plurality of raised, parallel lines is printed, wherein the printing ink for the printing of the first line structure contains color pigments with a tilting effect.
- a second line structure of a plurality of raised, mutually parallel lines is printed on the substrate. The parallel lines of the second line structure have a different orientation from the alignment of the parallel lines of the first line structure.
- the security feature according to the invention should be able to be generated in a single step.
- the security feature "latent image” is modified so that it can be produced instead of the conventionally used intaglio printing with an alternative printing process.
- a relief-like structure is not pressed into the substrate itself, but the required height differences are placed by a raised applied ink on the substrate.
- pigments are added to the ink with a color shift effect. This connects two independent optical security features firmly together.
- the interlocking of two initially independent security features creates a particularly strong new security feature.
- This new type of security feature is also an open security feature, since it can be visually perceived and checked easily without additional aids. Therefore, the review can be done by almost anyone and at any time.
- the printing ink for the printing of the second line structure also contains color pigments with a tilting effect.
- the security feature has an additional security aspect in the entire range of the latent image due to the tilting effect of the optically variable color used.
- the background printing also allows a refinement of the surface of the substrate, so that the line structures can be printed with a much better quality. It is advantageous here especially dull, dark colors, such as black.
- the first and second line structures have a height of at least 10 microns.
- the higher the printed lines of the first and the second line structure the better the tilting effect of the latent image.
- the printing ink for the first and the second line structure is cured after printing.
- hardening by thermal, ultraviolet or infrared radiation has proved to be particularly advantageous.
- the printed product comprises at least one third line structure of a plurality of raised, mutually parallel lines, which are applied to the printing material in a printing process.
- the third line structure has a different orientation from the first and the second line structure.
- the printing ink of the first line pattern contains at least 30% by weight of color pigments having a tilting effect.
- the raised lines of the first line structure preferably have at least a width of at least 130 micrometers.
- the ratio of line spacing to line width of the raised lines of the first line structure is preferably at least 1.5.
- FIG. 1 shows a schematic representation of a security feature according to the invention in a plan view
- Figure 2 is a schematic representation of a security feature according to the invention in cross section
- FIG. 3 shows a schematic illustration of an alternative exemplary embodiment of a security feature according to the invention in a plan view
- FIG. 4 shows a schematic representation of a further alternative exemplary embodiment of a security feature according to the invention in a plan view
- FIG. 5 shows a schematic top view of an alternative embodiment with contacting, interlocking line groups
- FIG. 6 shows a schematic plan view of a further alternative embodiment with contacting, interlocking line groups.
- the figures represent only schematically the structure according to the invention. For better clarity, no consideration was given to the actual size ratios.
- the schematic representations of the figures represent no limitations of the structure according to the invention.
- FIG. 1 illustrates schematically the basic structure of the security feature "latent image", as is realized in the inventive method. Shown is a label that is provided with a security feature. In the left area 10, several raised lines 1 1 are applied to a printing material 1. The lines 1 1 in this area are horizontal. In the area 20 right next to it, several raised lines 21 are also applied. These lines 21 are perpendicular. Thus, the orientation of the line 1 1 is offset by 90 ° to the orientation of the lines 21st
- Figure 2 shows schematically a section along the line 1 -1 'by such a structure shown in Figure 1.
- the sublime structure of the lines can be clearly seen. If such a structure is now illuminated by a light source from the direction A in FIG. 1, the raised lines 1 1 in the left-hand area 10 cast a clear shadow into the interspaces between the individual lines 11. The interspaces thus appear rather dark. In the right-hand area 20, on the other hand, the spaces between the lines 21 are well illuminated by the light source and therefore appear brighter.
- the structure is illuminated by a light source from direction B, the spaces between lines 1 1 appear rather light, while the spaces between lines 21 appear rather dark.
- the optical impression in the areas 10 and 20 therefore varies depending on the light incidence and viewing direction.
- the raised line structures 1 1 and 21 in the inventive method to the substrate 1 raised imprinted.
- all printing methods that can apply a corresponding printing ink in the required thickness to the substrate 1 are suitable. Particularly advantageous here, for example, the application has been found in screen printing.
- the lines 1 1 of the area 10 are applied, for example, in a first printing process on the printing material 1.
- the lines 21 of the region 20 are then subsequently applied to the printing material 1 in a further second printing process.
- the printing methods differ, for example, in the orientation of the measures with which the raised structures are produced.
- line heights In order to obtain a well perceived optical change in the variation of light incidence and viewing angle, line heights have been found preferably of at least 5 to 10 pm or better at least 30 pm. Line heights of up to 100 microns would be desirable, but are very difficult to implement with the technology available today.
- the printing ink for the raised lines 1 1 and 21 As printing ink for the production of such raised line structures 1 1 and 21, basically all colors can be used with which a desired line height can be achieved.
- the printing ink for the raised lines 1 1 and 21 during the process is liquid or at least of a tough consistency.
- the printed lines 1 1 and 21 should cure as quickly as possible.
- methods are particularly suitable in which a corresponding ink is activated after printing, so that a chemical or physical curing is initiated.
- the ink may be irradiated with microwave rays, for example, infrared or ultraviolet light, thereby curing. Since in this process usually no substances are released into the environment, not reduced the volume of the printed lines, which has an advantageous effect on the desired maximum height of the lines.
- the printing ink for the production of the raised lines 1 1 and 21 for a security feature according to the invention additionally color pigments with a so-called tilting added (optically variable color pigments).
- These color pigments with tilting effect which are used for the production of so-called optically variable colors, are small, multi-layered platelets. When light strikes such a plate, the light at the individual layers is partly reflected and partly transmitted. In interaction with the individual light components, which are thus reflected on different layers of a plate, interferences arise which, depending on the viewing angle, lead to variable color impressions. Depending on the structure of the individual platelets, the changing color impression varies.
- An admixture of a proportion of at least 30% by weight of optically variable color pigments to the printing ink has proven to be particularly suitable. Otherwise, the impression of a color variation can be significantly impaired, especially at low line heights.
- the quality of the security feature already increases, even if only part of the raised lines contain the color pigments with a tilting effect. For example, it is possible that only the lines 1 1 of a region 10 are provided with such color pigments, and the lines 21 of another region 20 are printed with a color without such special optically variable color pigments. Of course, it is also possible that all raised lines 1 1 and 21 are produced with a printing ink containing the corresponding color pigments.
- the relatively large height of the raised lines 1 1 and 21 for the construction of the latent image proves to be particularly advantageous also for the effect of the optically variable colors. Also, the effect of the optically variable colors appears all the more, the higher the color is applied.
- the distance D of the individual lines 1 1 and 21 from each other as well as the width LW of the individual lines depend on the character of the image to be displayed. Due to the different requirements that result from the constraints of the two security features latent image and optically variable color, as well as the framework conditions for the pressure of the raised structures, partially contradictory conditions must be considered.
- the distance D of the lines is, for example, the distance between two repeating corresponding structures of the lines, eg the distance between the line centers of two immediately adjacent lines.
- narrow line widths are advantageous for the clearest possible latent image, while larger line widths are more desirable for a reproduction by printing technology.
- a security feature according to the invention of latent image and optically variable color it has proved to be particularly suitable for the production of printing technology to select a line width LW of at least 130 ⁇ m.
- the ratio of line spacing D to line width LW should preferably not fall below a value of at least 1.5.
- the distance D should be at least 195 ⁇ m.
- the actual specifications of the structure may vary depending on the size and content of the security feature.
- any printable material is suitable. It is a particular advantage if the material for the printing material 1 has the smoothest possible surface. The printing material 1 should moreover absorb as little as possible of the printing ink, so that at best the entire volume of the applied printing ink for the raised line structures 1 1 and 21 on the surface of the printing material 1 is available. A high absorbency substrate would absorb a significant portion of the printed ink, which would result in less colorant for the formation of the raised latent image line structures. For this reason, plastic films of any type, for example, such as those made of polyethylene or polyvinyl chloride, for example, are very suitable as printing materials or as substrates or printing substrates to be printed.
- the surface of the printing substrate 1 can still be coated with a background print 30.
- a corresponding structure with background printing 30 is shown in FIG.
- a relatively dark color for example, a dark blue or red is selected for the background printing.
- a background print in black color has been found.
- the background print 30 has a matte or matt glossy character.
- the raised lines 1 1 and 21 have a mutually perpendicular orientation, i. they run at least approximately at a 90 ° angle to each other.
- the effect of a latent image can also be achieved with lines that are at an angle other than 90 ° to each other.
- the lines would also be possible, which run approximately at an angle of 60 ° or 45 ° to each other.
- FIG. 4 shows a further exemplary embodiment in which the latent image is built up from three raised line groups 11, 1, 121 and 131. Deferred images with the three groups of lines shown here, or even more, are possible in principle. As a result, a much greater variability of the tilting effect is achieved and a higher security level of the security feature according to the invention is achieved.
- the line group 1 1 1 has an orientation of parallel raised lines, in which all lines have an acute angle to a reference line, for example, a horizontally oriented line. The angle is for example 45 °.
- the line group 121 has a number of parallel raised lines that are perpendicular to the reference line.
- the line group 131 has a number of raised parallel lines which are at an obtuse angle to said reference line, for example 135 °.
- either all line groups 1 1, 21 and 31 or 1 1 1, 121, 131 can be made of printing inks with optically variable color pigments, or only one or two of the line groups are provided with such color pigments.
- the safety level of the safety feature generated in this way can be considerably increased by the use of the optically variable color pigments with a tilting effect.
- the line group 21 1 is surrounded on three of its sides, namely with respect to the drawing plane from above, from the right and from below completely by the line group 221. Only the edge of the line group 221 shown on the left is free and not surrounded by the line group 21 1.
- the line group 21 1 (not shown) completely around of is surrounded on all sides by lines of the line group 221.
- the lines of the one group each run perpendicular with respect to the orientation of the lines of the second group.
- the lines of the line group 221 run along a strip-shaped course within the lines of the line groups 21 1.
- the strip for the lines of line group 221 begins at the top right, then runs to the left, is guided in a right-pointing arc, so that the orientation almost reverses and the strip in turn goes to the right to the edge of the latent image.
- the lines of the line group 221 are arranged parallel to each other.
- the present invention relates to an open optical security feature with a high safety standard that can be relatively easily manufactured in a technical production process.
- the security features of optically variable colors with tilt effect and the properties of a latent image are combined and interlocked.
- the security features can be implemented inexpensively but still in a very high security standard.
- the security feature thus presented can be easily verified at any time by any person without additional aids.
Landscapes
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Printing Methods (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011016050A DE102011016050A1 (de) | 2011-04-04 | 2011-04-04 | Optisch variables Sicherheitsmerkmal |
PCT/EP2012/055855 WO2012136597A1 (de) | 2011-04-04 | 2012-03-30 | Optisch variables sicherheitsmerkmal |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2694296A1 true EP2694296A1 (de) | 2014-02-12 |
EP2694296B1 EP2694296B1 (de) | 2023-04-26 |
Family
ID=45974275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12714619.9A Active EP2694296B1 (de) | 2011-04-04 | 2012-03-30 | Optisch variables sicherheitsmerkmal |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140049034A1 (de) |
EP (1) | EP2694296B1 (de) |
DE (1) | DE102011016050A1 (de) |
WO (1) | WO2012136597A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201117523D0 (en) | 2011-10-11 | 2011-11-23 | Rue De Int Ltd | Security devices and methods of manufacture thereof |
DE102014115045A1 (de) * | 2014-10-16 | 2016-04-21 | Schreiner Group Gmbh & Co. Kg | Druckerzeugnis mit optischem Sicherheitsmerkmal |
CN104773003B (zh) * | 2015-04-17 | 2019-12-10 | 中钞油墨有限公司 | 印有增强动态光变防伪效果图纹的承印物及其制作方法 |
JP6468534B2 (ja) * | 2015-07-22 | 2019-02-13 | 独立行政法人 国立印刷局 | 真偽判別可能な情報担持体 |
GB2543050A (en) * | 2015-10-05 | 2017-04-12 | De La Rue Int Ltd | A method of manufacturing a security sheet and a security sheet |
JP6891011B2 (ja) * | 2016-06-30 | 2021-06-18 | キヤノン株式会社 | 画像処理装置、画像処理方法及びプログラム |
CA3028552A1 (en) | 2016-07-25 | 2018-02-01 | Sicpa Holding Sa | Multicomponent reactive inks and printing method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040195823A1 (en) * | 2001-08-06 | 2004-10-07 | Takao Yokote | Authenticatable printed matter and its production method |
US20070273146A1 (en) * | 2004-02-20 | 2007-11-29 | De La International Limited | Security Device |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4033059A (en) * | 1972-07-06 | 1977-07-05 | American Bank Note Company | Documents of value including intaglio printed transitory images |
US5199744A (en) * | 1988-09-09 | 1993-04-06 | De La Rue Plc | Security device |
JP2600094B2 (ja) * | 1992-06-04 | 1997-04-16 | 大蔵省印刷局長 | 偽造防止用潜像印刷物及びその印刷方法 |
KR100279937B1 (ko) * | 1993-06-08 | 2001-04-02 | 엠 커티스 | 은행권 등의 보안수단으로의 돋을새김하기 |
DE19544130A1 (de) * | 1995-11-27 | 1997-05-28 | Giesecke & Devrient Gmbh | Datenträger mit optisch variabler Farbe |
GB9806077D0 (en) * | 1998-03-20 | 1998-05-20 | Rue De Int Ltd | Latent image structure |
DE10044465A1 (de) * | 2000-09-08 | 2002-03-21 | Giesecke & Devrient Gmbh | Datenträger mit einem optisch variablen Element |
WO2004022355A2 (de) * | 2002-08-13 | 2004-03-18 | Giesecke & Devrient Gmbh | Datenträger mit einer optisch variablen struktur |
DE10243650A1 (de) * | 2002-09-19 | 2004-04-01 | Giesecke & Devrient Gmbh | Sicherheitselement |
NZ539221A (en) * | 2002-10-07 | 2007-06-29 | Note Printing Au Ltd | Embossed optically variable devices |
AU2003279931A1 (en) * | 2002-10-10 | 2004-05-04 | Document Security Systems, Inc. | Document containing security images |
DE102004003984A1 (de) * | 2004-01-26 | 2005-08-11 | Giesecke & Devrient Gmbh | Gitterbild mit einem oder mehreren Gitterfeldern |
DE102004046695A1 (de) * | 2004-09-24 | 2006-03-30 | Giesecke & Devrient Gmbh | Optisch variables Sicherheitselement |
AP2012006300A0 (en) * | 2009-12-08 | 2012-06-30 | Sicpa Holding Sa | Marking based on modified chiral liquid crystal polymers. |
-
2011
- 2011-04-04 DE DE102011016050A patent/DE102011016050A1/de active Pending
-
2012
- 2012-03-30 WO PCT/EP2012/055855 patent/WO2012136597A1/de active Application Filing
- 2012-03-30 US US14/009,578 patent/US20140049034A1/en not_active Abandoned
- 2012-03-30 EP EP12714619.9A patent/EP2694296B1/de active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040195823A1 (en) * | 2001-08-06 | 2004-10-07 | Takao Yokote | Authenticatable printed matter and its production method |
US20070273146A1 (en) * | 2004-02-20 | 2007-11-29 | De La International Limited | Security Device |
Non-Patent Citations (1)
Title |
---|
See also references of WO2012136597A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2694296B1 (de) | 2023-04-26 |
WO2012136597A1 (de) | 2012-10-11 |
DE102011016050A1 (de) | 2012-10-04 |
US20140049034A1 (en) | 2014-02-20 |
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