CA2155233A1 - Authenticatable, laminated device - Google Patents
Authenticatable, laminated deviceInfo
- Publication number
- CA2155233A1 CA2155233A1 CA 2155233 CA2155233A CA2155233A1 CA 2155233 A1 CA2155233 A1 CA 2155233A1 CA 2155233 CA2155233 CA 2155233 CA 2155233 A CA2155233 A CA 2155233A CA 2155233 A1 CA2155233 A1 CA 2155233A1
- Authority
- CA
- Canada
- Prior art keywords
- core layer
- layer
- optical interference
- laser beam
- marking
- 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.)
- Abandoned
Links
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
- B42D25/40—Manufacture
- B42D25/45—Associating two or more layers
- B42D25/465—Associating two or more layers using chemicals or adhesives
- B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
-
- 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
- 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
-
- 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
- B42D25/351—Translucent or partly translucent parts, e.g. windows
-
- 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
-
- 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
- B42D25/373—Metallic materials
-
- 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
- B42D25/40—Manufacture
- B42D25/405—Marking
- B42D25/43—Marking by removal of material
- B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
Abstract
An authenticatable, laminated article, e.g. an identity card or label, comprises laser markable core layer, e.g. of plastic, metal or paper, sandwiched between two protective layers, at least one of which is transparent, a viewing angle sensitive, optical interference, authenticating, laminate device is attached to the transparent protective layer by an adhesive layer. The transparent protective layer, optical interference layer, and the adhesive layer are capable of transmitting a laser beam for marking the core layer.
Description
21~5233 This invention relates to an authenticatable, l~min~ted article.
It has already been proposed in United States Patent No.
3.665,483. dated May 23, 1972, " Laser Recording Medium", C. H.
5 Becker et al, to provide a recording medium for the permanent storage of data by selective laser beam ablation of a layer of energy -absorbing material . The recording medium is a heat reflecting layer o~, for example rhodium sputtered on to a substrate of, for example, MYLAR (trade mark) or CELANAR (trade mark), and covered by a 10 transparent, protective layer of, for example, S i 2 It as also been proposed in United States Patent No.
4,544,181, dated Oct. 1, 1985, " Identification card", T. Maurer et al, to provide a multi-layered identification card comprising an opaque 15 card core of, for example, paper, l~min~ted between two cover sheets of, for example, polyvinyl chloride. At least one of the cover sheets is transparent so that information provided on the core by thermally, irreversibly degrading core portions, which also is formed in register therewith in the cover sheet, is visible as a validating feature 20 through the transparent cover sheet and may be manually inspected by virtue of a permanent relief-type structure produced in the cover sheet providing an secondary validating feature.
While the devices of Becker et al and Maurer et al are useful, 25 there is a need for a more readily discernible, more distinguishing, harder to reproduce, and more complex, secondary validating feature 21~S233 on these devices, than the permanent relief-type structure taught by Maurer et al.
According to the present invention there is provided an 5 authenticatable, l~min~ted article, comprising, a) an inner, laser beam markable, core layer, b) two protective layers, with the core layer sandwiched therebetween and visible through at least one of the protective layers, which is capable of transmitting a laser beam for marking the core layer, c) a viewing angle sensitive, optical interference, authenticating, l~min~te device on the side of the core layer at which the said at least one of the protective layers is disposed, at least a portion of the core layer is visible through the optical interference laminate device at at least one viewing angle, and the optical interference l~qminAte device is capable of transmitting a laser beam for marking the core layer, and d) an adhesive layer, through which any laser markings on the core layer are visible, att~çhing the optical interference, l~min~te device to the other components of the article, the adhesive layer being capable of transmitting a laser beam for marking the core layer.
In this specification authenticatable, l~min~qted article includes authenticatable, laminated labels and identity cards, teller cards and the like.
The laser beam transmitting protective layer, optical interference layer and adhesive layer allow the core to be marked through those components.
In this specification, capable of transmitting a laser beam for marking the core layer, means capable of transmitting a laser beam at the operating wavelength of a laser source used to mark the core layer.
The said at least one protective layer may also be a protective layer for the optical interference l~min~qte device.
The protective layers may be of a substance selected from the 15 group consisting of polycarbonate, polyvinyl chloride, a polyester, and a polyamide.
The adhesive layer may be a h e a t a c t i v a t e d adhesive of a substance selected from the group consisting of acrylated urethane, 20 non-acrylated urethane, polyvinylidene chloride, ethylene-vinyl acetate copolymer (EVA) and an epoxy adhesive.
The core layer may be a blank for subsequent marking by the laser beam.
The core layer may have been marked by a laser beam.
215~33 The core layer may have been marked by a laser beam which has displaced a portion of the optical interference layer.
In the accompanying drawings which illustrate, by way of 6 example, an embodiment of the present, Figure 1 is an enlarged diagrammatic, sectional end view along I-I, Figure 2, Figure 2 is a plan view of Figure 1, and Figure 3 is another enlarged, diagrammatic sectional end view along I-I, Figure 2, but of a different embodiment to that shown in Figures 1 and 2.
Referring now to Figure 1 and 2 there is shown an authenticatable, l~qmin~ted article 1, comprising, a) an inner, laser beam markable, core layer 2, b) two protective layers 4 and 6, with the core layer 2 sandwiched therebetween and visible through at least one, of the protective layers 4 and 6, in this embodiment 4, which is capable of transmitting a laser beam for marking the core layer 2, c) a viewing angle sensitive, optical interference, 26 authenticating, l~min~te device 8 on the side of the core layer 2 at which the said at least one 4 of the protective layers 4 and 6 is disposed, at least a portion of the core 21S523~
layer 2 is visible through the optical interference lAmin~te device 8 at at least one viewing angle, and the optical interference l~qmin~te device 8 is capable of transmitting a laser beam L for marking the core layer 2 with a mark such as 10, and d) an adhesive layer 12, through which any laser markings, such as 10, on the core layer 2 are visible, att~ching the optical interference, l~3min~te device 8 to the other components of the article 1, the adhesive layer 12 being capable of transmitting the laser beam L for marking the core layer 2.
The laser beam L, to mark the core layer 2, is arranged to enter the optical interference, l~min~te device 8 at an angle of incidence 'a' thereto, which in this embodiment is 0, at which no damage is done to the optical interference, l~min~te device 8.
In Figure 3, similar parts to those shown in Figure 1 and 2 are designated by the same reference numerals and the previous description is relied upon to describe them.
In Figure 3, the optical interference l~min~te device 8 is on the core layer 2, and the protective layer 4 is also a protective layer for the optical interference l~min~te device 8, which is also visible therethrough.
A further feature, which is included in the embodiment shown in Figure 2, is that the intensity of the laser beam L has been adjusted so that a relief 14 is formed over the marking 10, which displaces the optical intel-ference l~qmin~te device 8, the adhesive 5 layer 12, and the protective layer 4. This displacement of the optical interference l~min~te device 8 gives an added complexity to the optical interference characteristics thereof.
The core layer 2 may be of any material or combination of 10 materials which can be discolored by a laser beam and which will render laser markings thereon discernible, such as, for example, laser degradable plastic which may be transparent or opaque, paper alone, which may be burned or subjected to carbonization, or discoloration of a thermosensitive coating applied to an inlay, or a 15 metal such as rhodium coated with SiO2 or Al203 as an antireflective layer. All of these types of materials for the core layer 2 are known in the art.
The protective layers 4 and 6 may be of any suitable material 20 which will not be degraded by the laser beam, suitable materials are, for example, polycarbonate, polyvinyl chloride, a polyester or polyamide.
The viewing angle sensitive, optical interference, 26 authenticating, l~rnin~te device 8 may comprise at least one vapor deposited, light transmitting coating selected from the group consisting of Al, Inconel, SiO2, A103, ZnO2 and ZnS, MgF2. The -G--materials are disclosed in "Optical Document Security", Chapter 12, "Optical Thin-Film Security I?evices", J. A. Dobrowolski, pages 227-261, published by Artech House, Boston. London.
The adhesive layer 12 nlay be a h eat activated adhesive selected from the group consisting of acrylated or non-acrylated urethane, polyvinylidene chloride, ethylene-vinyl acetate copolymer (EvA)andanepoxyadhesive. The adhesive layer 12 may be thermosetting or thermoplastic, The viewing angle sensitive, optical interference, authenticating, l~min~te device 8, in some embodiments of the present invention, only partially covers or partially overlaps the core layer 2, while in other embodiments either of these components either of these components may extend over a larger area than the other one.
The present invention allows, for example, a card or label to have the core layer, protective layers, optical interference l~min~te device, and adhesive layer to be assembled and then the core laser marked, or the assembly sold as a blank for the core layer to be laser marked by a purchaser, giving added security in that any disturbance or degradation during marking, that occurs to any components other than the core layer is registered with the markings on the core layer and is difficult if not impossible to realign if the article is tampered with.
It has already been proposed in United States Patent No.
3.665,483. dated May 23, 1972, " Laser Recording Medium", C. H.
5 Becker et al, to provide a recording medium for the permanent storage of data by selective laser beam ablation of a layer of energy -absorbing material . The recording medium is a heat reflecting layer o~, for example rhodium sputtered on to a substrate of, for example, MYLAR (trade mark) or CELANAR (trade mark), and covered by a 10 transparent, protective layer of, for example, S i 2 It as also been proposed in United States Patent No.
4,544,181, dated Oct. 1, 1985, " Identification card", T. Maurer et al, to provide a multi-layered identification card comprising an opaque 15 card core of, for example, paper, l~min~ted between two cover sheets of, for example, polyvinyl chloride. At least one of the cover sheets is transparent so that information provided on the core by thermally, irreversibly degrading core portions, which also is formed in register therewith in the cover sheet, is visible as a validating feature 20 through the transparent cover sheet and may be manually inspected by virtue of a permanent relief-type structure produced in the cover sheet providing an secondary validating feature.
While the devices of Becker et al and Maurer et al are useful, 25 there is a need for a more readily discernible, more distinguishing, harder to reproduce, and more complex, secondary validating feature 21~S233 on these devices, than the permanent relief-type structure taught by Maurer et al.
According to the present invention there is provided an 5 authenticatable, l~min~ted article, comprising, a) an inner, laser beam markable, core layer, b) two protective layers, with the core layer sandwiched therebetween and visible through at least one of the protective layers, which is capable of transmitting a laser beam for marking the core layer, c) a viewing angle sensitive, optical interference, authenticating, l~min~te device on the side of the core layer at which the said at least one of the protective layers is disposed, at least a portion of the core layer is visible through the optical interference laminate device at at least one viewing angle, and the optical interference l~qminAte device is capable of transmitting a laser beam for marking the core layer, and d) an adhesive layer, through which any laser markings on the core layer are visible, att~çhing the optical interference, l~min~te device to the other components of the article, the adhesive layer being capable of transmitting a laser beam for marking the core layer.
In this specification authenticatable, l~min~qted article includes authenticatable, laminated labels and identity cards, teller cards and the like.
The laser beam transmitting protective layer, optical interference layer and adhesive layer allow the core to be marked through those components.
In this specification, capable of transmitting a laser beam for marking the core layer, means capable of transmitting a laser beam at the operating wavelength of a laser source used to mark the core layer.
The said at least one protective layer may also be a protective layer for the optical interference l~min~qte device.
The protective layers may be of a substance selected from the 15 group consisting of polycarbonate, polyvinyl chloride, a polyester, and a polyamide.
The adhesive layer may be a h e a t a c t i v a t e d adhesive of a substance selected from the group consisting of acrylated urethane, 20 non-acrylated urethane, polyvinylidene chloride, ethylene-vinyl acetate copolymer (EVA) and an epoxy adhesive.
The core layer may be a blank for subsequent marking by the laser beam.
The core layer may have been marked by a laser beam.
215~33 The core layer may have been marked by a laser beam which has displaced a portion of the optical interference layer.
In the accompanying drawings which illustrate, by way of 6 example, an embodiment of the present, Figure 1 is an enlarged diagrammatic, sectional end view along I-I, Figure 2, Figure 2 is a plan view of Figure 1, and Figure 3 is another enlarged, diagrammatic sectional end view along I-I, Figure 2, but of a different embodiment to that shown in Figures 1 and 2.
Referring now to Figure 1 and 2 there is shown an authenticatable, l~qmin~ted article 1, comprising, a) an inner, laser beam markable, core layer 2, b) two protective layers 4 and 6, with the core layer 2 sandwiched therebetween and visible through at least one, of the protective layers 4 and 6, in this embodiment 4, which is capable of transmitting a laser beam for marking the core layer 2, c) a viewing angle sensitive, optical interference, 26 authenticating, l~min~te device 8 on the side of the core layer 2 at which the said at least one 4 of the protective layers 4 and 6 is disposed, at least a portion of the core 21S523~
layer 2 is visible through the optical interference lAmin~te device 8 at at least one viewing angle, and the optical interference l~qmin~te device 8 is capable of transmitting a laser beam L for marking the core layer 2 with a mark such as 10, and d) an adhesive layer 12, through which any laser markings, such as 10, on the core layer 2 are visible, att~ching the optical interference, l~3min~te device 8 to the other components of the article 1, the adhesive layer 12 being capable of transmitting the laser beam L for marking the core layer 2.
The laser beam L, to mark the core layer 2, is arranged to enter the optical interference, l~min~te device 8 at an angle of incidence 'a' thereto, which in this embodiment is 0, at which no damage is done to the optical interference, l~min~te device 8.
In Figure 3, similar parts to those shown in Figure 1 and 2 are designated by the same reference numerals and the previous description is relied upon to describe them.
In Figure 3, the optical interference l~min~te device 8 is on the core layer 2, and the protective layer 4 is also a protective layer for the optical interference l~min~te device 8, which is also visible therethrough.
A further feature, which is included in the embodiment shown in Figure 2, is that the intensity of the laser beam L has been adjusted so that a relief 14 is formed over the marking 10, which displaces the optical intel-ference l~qmin~te device 8, the adhesive 5 layer 12, and the protective layer 4. This displacement of the optical interference l~min~te device 8 gives an added complexity to the optical interference characteristics thereof.
The core layer 2 may be of any material or combination of 10 materials which can be discolored by a laser beam and which will render laser markings thereon discernible, such as, for example, laser degradable plastic which may be transparent or opaque, paper alone, which may be burned or subjected to carbonization, or discoloration of a thermosensitive coating applied to an inlay, or a 15 metal such as rhodium coated with SiO2 or Al203 as an antireflective layer. All of these types of materials for the core layer 2 are known in the art.
The protective layers 4 and 6 may be of any suitable material 20 which will not be degraded by the laser beam, suitable materials are, for example, polycarbonate, polyvinyl chloride, a polyester or polyamide.
The viewing angle sensitive, optical interference, 26 authenticating, l~rnin~te device 8 may comprise at least one vapor deposited, light transmitting coating selected from the group consisting of Al, Inconel, SiO2, A103, ZnO2 and ZnS, MgF2. The -G--materials are disclosed in "Optical Document Security", Chapter 12, "Optical Thin-Film Security I?evices", J. A. Dobrowolski, pages 227-261, published by Artech House, Boston. London.
The adhesive layer 12 nlay be a h eat activated adhesive selected from the group consisting of acrylated or non-acrylated urethane, polyvinylidene chloride, ethylene-vinyl acetate copolymer (EvA)andanepoxyadhesive. The adhesive layer 12 may be thermosetting or thermoplastic, The viewing angle sensitive, optical interference, authenticating, l~min~te device 8, in some embodiments of the present invention, only partially covers or partially overlaps the core layer 2, while in other embodiments either of these components either of these components may extend over a larger area than the other one.
The present invention allows, for example, a card or label to have the core layer, protective layers, optical interference l~min~te device, and adhesive layer to be assembled and then the core laser marked, or the assembly sold as a blank for the core layer to be laser marked by a purchaser, giving added security in that any disturbance or degradation during marking, that occurs to any components other than the core layer is registered with the markings on the core layer and is difficult if not impossible to realign if the article is tampered with.
Claims (7)
1. An authenticating, laminated article, comprising, a) an inner, laser beam markable, core layer, b) two protective layers, with the core layer sandwiched therebetween and visible through at least one of the protective layers, which is capable of transmitting a laser beam for marking the core layer, c) a viewing angle sensitive, optical interference, authenticating, laminate device on the side of the core layer at which the said at least one of the protective layers is disposed, at least a portion of the core layer is visible through the optical interference laminate device at at least one viewing angle, and the optical interference laminate device is capable of transmitting a laser beam for marking the core layer, and d) an adhesive layer, through which any laser marking on the core layer are visible, attaching the optical interference, laminate device to the other components of the article, the adhesive layer being capable of transmitting a laser beam for marking the core layer,
2. An article according to claim 1, wherein the said at least one protective layer is also a protective layer for the optical interference laminate device.
3. An article according to claim 1, wherein the protective layers are of a substance selected from the group consisting of polycarbonate, polyvinyl chloride, a polyester, and a polyamide.
4. An article according to claim 1, wherein the adhesive layer is a h e a t a c t i v a t e d adhesive of a substance selected from the group consisting of acrylated urethane, non-acrylated urethane, polyvinylidene chloride, ethylene-vinyl acetate copolymer (EVA) and an epoxy adhesive.
5. An article according to claim 1, wherein the core layer is blank for subsequent marking by the laser beam.
6. An article according to claim 1, wherein the core layer has been marked by a laser beam.
7. An article according to claim 6, wherein the laser marking has displaced a portion of the optical interference laminate device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2155233 CA2155233A1 (en) | 1995-08-02 | 1995-08-02 | Authenticatable, laminated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2155233 CA2155233A1 (en) | 1995-08-02 | 1995-08-02 | Authenticatable, laminated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2155233A1 true CA2155233A1 (en) | 1997-02-03 |
Family
ID=4156346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2155233 Abandoned CA2155233A1 (en) | 1995-08-02 | 1995-08-02 | Authenticatable, laminated device |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2155233A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6180318B1 (en) | 1999-05-19 | 2001-01-30 | 3M Innovative Properties Company | Method of imaging an article |
| US6824849B2 (en) | 2000-08-07 | 2004-11-30 | 3M Innovative Properties Company | Laser-cuttable multi-layer sheet material |
| EP3178660B1 (en) | 2015-12-07 | 2019-02-06 | Hueck Folien Ges.m.b.H | Personalisable security element |
-
1995
- 1995-08-02 CA CA 2155233 patent/CA2155233A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6180318B1 (en) | 1999-05-19 | 2001-01-30 | 3M Innovative Properties Company | Method of imaging an article |
| US6824849B2 (en) | 2000-08-07 | 2004-11-30 | 3M Innovative Properties Company | Laser-cuttable multi-layer sheet material |
| EP3178660B1 (en) | 2015-12-07 | 2019-02-06 | Hueck Folien Ges.m.b.H | Personalisable security element |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |
Effective date: 19980803 |