EP1322478A1 - Verfahren und vorrichtung zur personalisierung von lumineszierenden echtheitsmerkmalen - Google Patents
Verfahren und vorrichtung zur personalisierung von lumineszierenden echtheitsmerkmalenInfo
- Publication number
- EP1322478A1 EP1322478A1 EP01969560A EP01969560A EP1322478A1 EP 1322478 A1 EP1322478 A1 EP 1322478A1 EP 01969560 A EP01969560 A EP 01969560A EP 01969560 A EP01969560 A EP 01969560A EP 1322478 A1 EP1322478 A1 EP 1322478A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- authenticity feature
- authenticity
- feature
- light
- lighting
- 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
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004061 bleaching Methods 0.000 claims abstract description 16
- 239000004033 plastic Substances 0.000 claims abstract description 9
- 230000005284 excitation Effects 0.000 claims description 9
- 239000013543 active substance Substances 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 230000003595 spectral effect Effects 0.000 claims description 5
- 230000005672 electromagnetic field Effects 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000005415 bioluminescence Methods 0.000 claims description 2
- 230000029918 bioluminescence Effects 0.000 claims description 2
- 239000000969 carrier Substances 0.000 claims 1
- 230000006378 damage Effects 0.000 claims 1
- 238000005424 photoluminescence Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract 1
- 239000000976 ink Substances 0.000 description 19
- 239000000126 substance Substances 0.000 description 9
- 238000004020 luminiscence type Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000000049 pigment Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010330 laser marking Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- HQQTZCPKNZVLFF-UHFFFAOYSA-N 4h-1,2-benzoxazin-3-one Chemical class C1=CC=C2ONC(=O)CC2=C1 HQQTZCPKNZVLFF-UHFFFAOYSA-N 0.000 description 1
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 238000002073 fluorescence micrograph Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- DNXIASIHZYFFRO-UHFFFAOYSA-N pyrazoline Chemical compound C1CN=NC1 DNXIASIHZYFFRO-UHFFFAOYSA-N 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- AFNRRBXCCXDRPS-UHFFFAOYSA-N tin(ii) sulfide Chemical class [Sn]=S AFNRRBXCCXDRPS-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
- B41M5/286—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using compounds undergoing unimolecular fragmentation to obtain colour shift, e.g. bleachable dyes
-
- 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
- B41M3/144—Security printing using fluorescent, luminescent or iridescent effects
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/267—Marking of plastic artifacts, e.g. with laser
Definitions
- UV inks are also used in security features. These “UV inks” are only visible when they are excited to fluorescence or phosphorescence with UV light. They are available in printing inks or in fibers and are processed using various printing processes or paper or plastic are added directly to the substrates.
- UV inks are used in security technology, which are only visible under UV light due to fluorescence or phosphorescence, but that security features developed from them cannot be personalized.
- a method should therefore be proposed with which laser marking on luminescent substances is possible, which is not visible under normal conditions, but is visible with the aid of a UV light source or another suitable excitation.
- the object of the invention is therefore to provide a method for laser marking luminescent authenticity features or markings, in which the marking generated is not visible in the normal state, but with the aid of a UV lamp or by means of an excitation in the electromagnetic field as a negative luminescence image (fluorescence image or phosphorescence image) is visible.
- the object is achieved by a process which provides for bleaching the active luminescent pigments or dyes with the aid of a laser or another suitable energy beam.
- the invention thus sets a laser personalization of UV security features such. B. in plastic cards ahead and combines the advantages of two methods, namely personalization using a laser beam and also the personalization of luminescent substances and their verification under UV light or another high-energy excitation medium.
- the invention generally claims the personalization of luminescent authenticity markings of any kind on any data carrier. Furthermore, the personalization of chemo- and / or bioluminescent substances is generally claimed to be essential to the invention.
- the generic term “luminescence” is therefore used in the following description as a synonym for all three lighting phenomena.
- a multi-layer plastic card (eg in the form of a check card) is described as the data carrier.
- the invention is not limited to this.
- the structure of a check card is used below for the further description of the invention.
- the marking can therefore be printed as a printing ink on a specific or even several layers of the data carrier or applied in some other way.
- the marking can also be integrated into the plastic polymer of one or more layers of the data carrier.
- the luminescent substance can also be incorporated into the adhesive, the lacquer or as an additive in the plastic material.
- UV color is generally understood to mean a marking, substance or authenticity feature which, using a photo and / or chemo- and / or bio-luminescence when absorbing an energy-rich light (usually ultraviolet light), is a light phenomenon caused. It is preferred in the context of the invention that the lighting effect takes place in visible light.
- the invention is not limited to this.
- this light phenomenon can therefore also take place in the invisible spectral range and can be evaluated by machine.
- the invention is also not limited to excitation with UV light; It is therefore also possible to provide an excitation in a corresponding electromagnetic field which is suitable for causing the substance to light up (visible or invisible).
- the different interactions between laser light and matter include the bleaching of color-active substances. According to the invention, it is possible here to destroy these color-active substances with the aid of a laser beam. For example, the body color of a substrate containing pigments changes from colored to white.
- the color-active substance absorbs the laser light and undergoes a chemical reaction in which it loses its color properties.
- the color-active substance is chemically broken down.
- the laser light should not stimulate any side reactions that lead to discolouration of the substrate and therefore do not cause bleaching to white.
- UV inks contain pigments or dyes which normally do not appear colored or are only weakly colored, but are stimulated to emit visible light by UV absorption or other electromagnetic excitation.
- the phenomenon is generally referred to as "cold glow” or luminescence.
- fluorescence and phosphorescence Depending on the lifespan of the excited states, a distinction is made between fluorescence and phosphorescence, with the emission occurring very quickly in the first case and afterglow also being observed after the UV excitation in the second case.
- UV inks is used frequently, but is misleading in that most of the so-called substances are not colored. In addition, the term “UV inks” is used inaccurately for UV-curing printing inks. The term UV does not refer to luminescent effects, but to the mechanism of chemical hardening during processing.
- UV inks the color-active substance is destroyed by intensive laser light, analogously to the absorption inks.
- the substrate should not be damaged in the visible range or its color impression changed.
- a selective (UV) wavelength range must therefore be used (Band, in the non-visible range) and the intensity must be dosed so that the UV color itself is excited by the absorption and then disintegrates, which corresponds to bleaching, in this way the bleaching would be done with visible pigments ,
- UV inks are not or only weakly colored under normal conditions, they hardly absorb any visible light. For this reason, ultraviolet light must be used for bleaching. In this case, a laser wavelength range should preferably be selected, which is particularly different from the "UV ink” used is well absorbed.
- UV inks that are suitable for bleaching by UV laser radiation belong to the following classes of substances, for example:
- Tin sulfide derivatives benzoxazinone derivatives
- infrared radiation and / or radiation of other wavelengths can also be used for bleaching the “UV colors” if the color-active substances in the corresponding spectral range absorb the radiation used in each case without the color-active substances becoming visibly discolored.
- the substrate to be marked has a uniform luminescence. This is achieved by evenly applying "UV printing inks” or by incorporating the "UV inks” into a polymer matrix.
- the substrate can then be marked with the aid of the laser by completely bleaching the “UV color” locally. In this way, for example, vector fonts or raster scanning images can be generated.
- partially bleaching by modulating the laser power achieve and thus generate grayscale images.
- images printed with “UV inks” or other security features that contain “UV inks” can also be subsequently marked.
- FIG. 2 section through the card structure according to FIG. 1 with the action of a laser beam
- FIG. 3 shows a schematic plan view of the structure according to FIG. 2;
- FIG. 1 an excerpt from a map structure is shown in section on an unscaled scale.
- a luminescent authenticity feature 3 is arranged on a carrier film 2.
- the structure 4 When illuminated with, for example, UV light 5, the structure 4 is excited in such a way that, for example, lighting occurs in visible light 6.
- this authenticity feature 3 is now to be personalized.
- a laser beam 7 (see FIGS. 2 and 3) is used, for example Lettering 8 inscribed in the structure 4 of the authenticity feature 3.
- the intensity of the laser beam is selected so that the structure 4 is transferred to the structure 4 'only in the area of the action of the laser beam.
- the structure 4 ' should not have any structure or color change which can be seen in visible light.
- the luminescence is chosen by choosing the intensity of the laser beam 7 so that there is only an impairment of the luminescence, but not an extinction, a halftone or grayscale image can be seen as the lettering 8 even when irradiated with a UV lamp 10 ,
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Telephone Function (AREA)
- Preliminary Treatment Of Fibers (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10048812 | 2000-09-29 | ||
| DE10048812A DE10048812B4 (de) | 2000-09-29 | 2000-09-29 | Datenträger mit mittels energiereichem Strahl personalisierbaren Echtheitsmerkmalen |
| PCT/EP2001/008879 WO2002026507A1 (de) | 2000-09-29 | 2001-08-01 | Verfahren und vorrichtung zur personalisierung von lumineszierenden echtheitsmerkmalen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1322478A1 true EP1322478A1 (de) | 2003-07-02 |
| EP1322478B1 EP1322478B1 (de) | 2010-02-10 |
Family
ID=7658451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20010969560 Expired - Lifetime EP1322478B1 (de) | 2000-09-29 | 2001-08-01 | Verfahren und vorrichtung zur personalisierung von lumineszierenden echtheitsmerkmalen |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7188776B2 (de) |
| EP (1) | EP1322478B1 (de) |
| AT (1) | ATE457237T1 (de) |
| AU (1) | AU2001289780A1 (de) |
| DE (2) | DE10048812B4 (de) |
| ES (1) | ES2339104T3 (de) |
| WO (1) | WO2002026507A1 (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015173364A1 (de) | 2014-05-16 | 2015-11-19 | U-Nica Technology Ag | Datenträger mit personalisierbarem echtheitsmerkmal |
| EP3093156A1 (de) | 2015-05-12 | 2016-11-16 | U-NICA Technology AG | Datenträger mit personalisierbarem magnetischen echtheitsmerkmal |
| WO2016180673A2 (de) | 2015-05-12 | 2016-11-17 | U-Nica Technology Ag | Datenträger mit personalisierbarem magnetischen echtheitsmerkmal |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10115949A1 (de) * | 2001-03-30 | 2002-10-02 | Orga Kartensysteme Gmbh | Unsichtbare Laserbeschriftung als Sicherheitsmerkmal für Kunststoffkarten |
| CA2470600C (en) | 2001-12-24 | 2009-12-22 | Digimarc Id Systems, Llc | Systems, compositions, and methods for full color laser engraving of id documents |
| AU2002364036A1 (en) | 2001-12-24 | 2003-07-15 | Digimarc Id Systems, Llc | Laser etched security features for identification documents and methods of making same |
| US7728048B2 (en) | 2002-12-20 | 2010-06-01 | L-1 Secure Credentialing, Inc. | Increasing thermal conductivity of host polymer used with laser engraving methods and compositions |
| WO2003088144A2 (en) | 2002-04-09 | 2003-10-23 | Digimarc Id Systems, Llc | Image processing techniques for printing identification cards and documents |
| US7824029B2 (en) | 2002-05-10 | 2010-11-02 | L-1 Secure Credentialing, Inc. | Identification card printer-assembler for over the counter card issuing |
| DE102005039320A1 (de) * | 2005-08-19 | 2007-02-22 | Giesecke & Devrient Gmbh | Kartenförmiger Datenträger |
| DE102005039319A1 (de) | 2005-08-19 | 2007-02-22 | Giesecke & Devrient Gmbh | Kartenförmiger Datenträger |
| GB2448764A (en) * | 2007-04-27 | 2008-10-29 | Zahir Ahmed | Markable textile and method of manufacture thereof |
| DE102008053582B3 (de) † | 2008-10-28 | 2010-04-22 | Giesecke & Devrient Gmbh | Datenträger und Verfahren zu dessen Herstellung |
| DE102010022701B4 (de) * | 2010-06-04 | 2012-02-02 | Innovent E.V. | Verfahren zur Kennzeichung eines Substrates |
| DE102011007349B4 (de) * | 2011-04-14 | 2013-03-28 | Innovent E.V. | Verfahren zur Kennzeichnung eines Substrates |
| EP2579217A1 (de) * | 2011-10-04 | 2013-04-10 | Deutsche Post AG | Verfahren und Vorrichtung für die Markierung von Wertlabeln |
| CN105829118A (zh) * | 2013-12-17 | 2016-08-03 | 默克专利股份有限公司 | 制备标记的方法 |
| JP6334340B2 (ja) * | 2014-09-12 | 2018-05-30 | 株式会社東芝 | 偽変造防止媒体、偽変造防止媒体作成装置及び偽変造防止媒体作成方法 |
| DE102015106518A1 (de) * | 2015-04-28 | 2016-11-03 | Johnson Electric Germany GmbH & Co. KG | Elektrisches Bauteil |
| DE102016004900A1 (de) | 2016-04-22 | 2017-10-26 | Giesecke+Devrient Mobile Security Gmbh | Chipkarte mit Lichtquelle |
| DE102016111699A1 (de) | 2016-06-27 | 2017-12-28 | Günter de Rosa | Verfahren und Vorrichtung zur Wiedergabe von Informationen auf einer nachleuchtenden Schicht |
| WO2018001557A1 (de) | 2016-06-27 | 2018-01-04 | Schmidleitner, Veit | Verfahren und vorrichtung zur wiedergabe von informationen auf einer nachleuchtenden schicht |
| US12470254B2 (en) | 2019-10-03 | 2025-11-11 | collectID AG | Methods and systems for authenticating physical products via near field communication tags and recording authentication transactions on a blockchain |
| EP3842254A1 (de) | 2019-12-24 | 2021-06-30 | Thales Dis France Sa | Personalisierbares lumineszierendes sicherheitselement |
| DE102023128446A1 (de) * | 2023-10-17 | 2025-04-17 | Giesecke+Devrient ePayments GmbH | Verfahren zum Erzeugen einer Fluoreszenzeigenschaft in einem Material mit einem Laser |
| DE102023135934A1 (de) * | 2023-12-20 | 2025-06-26 | Khs Gmbh | Verfahren und Vorrichtung zum Auslesen mindestens eines Codeelements mindestens eines Kunststoff-Behälters |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3744877A (en) * | 1971-06-24 | 1973-07-10 | American Cyanamid Co | Dark trace display device employing uv phosphor plus photochromic resin inside the display screen which generates color by means of triplet-to-triplet absorption |
| US4663518A (en) * | 1984-09-04 | 1987-05-05 | Polaroid Corporation | Optical storage identification card and read/write system |
| GB8615706D0 (en) * | 1986-06-27 | 1986-08-06 | Plessey Co Plc | Irreversible photochromic markings |
| GB8729591D0 (en) | 1987-12-18 | 1988-02-03 | De La Rue Co Plc | Improvements relating to coloured image generation |
| EP0430810A1 (de) * | 1989-11-30 | 1991-06-05 | Arjo Wiggins S.A. | Sicherheitsträger mit einem strahlensammelnden Element, der zum Ende des Elements einen induzierten Strahl bei Rückstrahlung führt |
| FR2749673B1 (fr) * | 1996-06-11 | 1998-07-31 | Gemplus Card Int | Procede d'impression d'une couche d'un corps de support portable, notamment carte a memoire, et corps de support imprime selon un tel procede |
| DE19711343A1 (de) * | 1997-03-18 | 1998-09-24 | Damm Tobias Dr | Plastikkarte mit individueller optischer Information |
| EP0977981B1 (de) * | 1997-04-25 | 2003-07-09 | Universiteit van Amsterdam | Photobleichbare lumineszenzschichten zur kalibrierung und standardisierung in optischer mikroskopie |
| JPH11344376A (ja) * | 1998-06-01 | 1999-12-14 | Ishisaki:Kk | フォトクロミック組成物及びフォトクロミック組成物を含む紫外線センサー |
| DE19840733C2 (de) * | 1998-09-07 | 2000-10-05 | Plusprint Druckmedien Gmbh | Sicherheits-Abdeckaufkleber |
| DE19849543A1 (de) * | 1998-10-27 | 1999-04-15 | Siemens Ag | Markierbare optische Faser oder Ader |
| DE19914702A1 (de) * | 1999-03-31 | 2000-10-05 | Norbert Hampp | Verfahren und Zubereitung zur photochromen Markierung und/oder Sicherung der Authentizität von Gegenständen |
| DE19923959A1 (de) * | 1999-05-25 | 2000-11-30 | Giesecke & Devrient Gmbh | Wertdokument |
| DE10011486A1 (de) | 1999-08-30 | 2001-03-01 | Orga Kartensysteme Gmbh | Kartenförmiger Datenträger und Verfahren zu seiner Herstellung |
| DE19955383A1 (de) | 1999-10-29 | 2001-05-03 | Orga Kartensysteme Gmbh | Verfahren zum Aufbringen von farbigen Informationen auf einen Gegenstand |
| US6475648B1 (en) * | 2000-06-08 | 2002-11-05 | Eastman Kodak Company | Organic electroluminescent devices with improved stability and efficiency |
| DE10053264A1 (de) * | 2000-10-26 | 2002-05-08 | Orga Kartensysteme Gmbh | Verfahren zum Einschreiben von Daten auf/in Datenträger mittels Laserstrahlung und damit hergestellte Datenträger |
| KR20020096025A (ko) * | 2002-09-30 | 2002-12-28 | 건설화학공업(주) | 알데하이드와 하이디로퀴놀린을 갖는 바이페닐 유도체와이를 발색재료로서 채용하고 있는 유기전기 발광소자 |
-
2000
- 2000-09-29 DE DE10048812A patent/DE10048812B4/de not_active Expired - Lifetime
-
2001
- 2001-08-01 DE DE50115346T patent/DE50115346D1/de not_active Expired - Lifetime
- 2001-08-01 EP EP20010969560 patent/EP1322478B1/de not_active Expired - Lifetime
- 2001-08-01 ES ES01969560T patent/ES2339104T3/es not_active Expired - Lifetime
- 2001-08-01 AT AT01969560T patent/ATE457237T1/de active
- 2001-08-01 AU AU2001289780A patent/AU2001289780A1/en not_active Abandoned
- 2001-08-01 US US10/381,462 patent/US7188776B2/en not_active Expired - Lifetime
- 2001-08-01 WO PCT/EP2001/008879 patent/WO2002026507A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0226507A1 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015173364A1 (de) | 2014-05-16 | 2015-11-19 | U-Nica Technology Ag | Datenträger mit personalisierbarem echtheitsmerkmal |
| EP3093156A1 (de) | 2015-05-12 | 2016-11-16 | U-NICA Technology AG | Datenträger mit personalisierbarem magnetischen echtheitsmerkmal |
| WO2016180673A2 (de) | 2015-05-12 | 2016-11-17 | U-Nica Technology Ag | Datenträger mit personalisierbarem magnetischen echtheitsmerkmal |
| US9676220B2 (en) | 2015-05-12 | 2017-06-13 | U-Nica Technology Ag | Data carrier with personalizable magnetic authenticity feature |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10048812B4 (de) | 2005-07-28 |
| EP1322478B1 (de) | 2010-02-10 |
| US7188776B2 (en) | 2007-03-13 |
| US20050098636A1 (en) | 2005-05-12 |
| AU2001289780A1 (en) | 2002-04-08 |
| ATE457237T1 (de) | 2010-02-15 |
| DE50115346D1 (de) | 2010-03-25 |
| DE10048812A1 (de) | 2002-04-18 |
| ES2339104T3 (es) | 2010-05-17 |
| WO2002026507A1 (de) | 2002-04-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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