1
Wolfgang Becker, Alexander Hierweger, Hansjurgen Merkle, Erwin Lob, Joseph Lass, Wittich Kaule: Data carrier having an optical authenticity feature and methods for producing and testing said data carrier. GAO Gesellschaft fur Automation und Organisation mbH, Bacon & Thomas, August 23, 1988: US04765656 (165 worldwide citation)

The present invention relates to a data carrier (identification card, bank card, credit card, etc.) in which information is provided in an inner volume area by means of a laser beam, the information being visible in the form of changes in the optical properties of the carrier material due to an irre ...


2
Wittich Kaule, Gerhard Stenzel: Security paper with authenticity features in the form of substances luminescing only in the invisible region of the optical spectrum and process for testing the same. Gao Gesellschaft fur Automation und Organisation mbH, Schwartz Jeffery Schwaab Mack Blumenthal & Koch, May 29, 1984: US04451521 (86 worldwide citation)

Security paper with luminescing authenticity characteristics which after excitation with invisible light emit exclusively invisible light of different wavelengths as authenticity signal. The luminophores can be included in the printing ink used or they can be added to the paper material in the manuf ...


3
Wittich Kaule, Jurgen Moll, Gerhard Schwenk, Gerhard Stenzel: Antifalsification document having a security thread embedded therein and a method for producing the same. GAO Gesellschaft fuer Automation und Organisation mbH, Robert J Koch, January 9, 1990: US04892336 (81 worldwide citation)

The present invention relates to an antifalsification document having an embedded secutiry thread, and to a method for producing the same. This security thread is transparent and has a printed pattern on one side and, on the opposite side, a lenticular structure coordinated with the printed pattern. ...


4
Wittich Kaule: Security document and a method for producing it. GAO Gesellschaft fur Automation und Organisation mbH, Bacon & Thomas, May 14, 1996: US05516153 (75 worldwide citation)

A security element for use in a security document such as a bank note, identity card or the like includes at least a partial metallic coating on a substrate and wherein the metallic coating includes recesses in the forms of characters or patterns that are visually recognizable at least in transmitte ...


5
Christoph Heckenkamp, Wittich Kaule, Gerhard Stenzel: Data carrier having an optically variable element and methods for producing it. GAO Gesellschaft fur Automation und Organisation mbH, Andrus Sceales Starke & Sawall, September 1, 1998: US05801857 (71 worldwide citation)

The invention relates to a system comprising a series of data carriers, in particular identity cards, papers of value or the like, whereby the data carriers belonging to the system exhibit diffraction structures containing standard information and parts of the series are changed by additional measur ...


6
Wittich Kaule, Gerhard Stenzel, Jurgen Moll, Gerhard Schwenk: Security document having a security thread embedded therein and methods for producing and testing the authenticity of the security document. G A O Gesellschaft fuer Automation und Organisation mbH, Robert J Koch, July 12, 1988: US04756557 (62 worldwide citation)

In order to increase the protection of security documents such as ban notes, etc., against forgery, security threads are embedded in the document which have at least two areas extending in the longitudinal direction of the thread and differing in their physical properties. The thread is preferably a ...


7
Wittich Kaule, Gerhard Schwenk, Gerhard Stenzel: Security paper with authenticity features in the form of luminescing substances. GAO Gesellschaft fur Automation und Organisation mbH, Schwartz Jeffery Schwaab Mack Blumenthal & Koch, May 29, 1984: US04451530 (50 worldwide citation)

Security papers with luminescing authenticity features worked into them or printed on them. The authenticity features used consist of a luminophore and one or more absorbing materials by which the emission and/or the excitation spectrum of the luminophore is changed in detectable fashion. The dyestu ...


8
Christoph Heckenkamp, Wittich Kaule, Gerhard Stenzel: Data carrier having an optically variable element and methods for producing it. GAO Gesellschaft für Automation und Organisation mbH, Bacon & Thomas, January 8, 2002: US06337752 (47 worldwide citation)

The invention relates to a system comprising a series of data carriers, in particular identity cards, papers of value or the like, whereby the data carriers belonging to the system exhibit diffraction structures containing standard information and parts of the series are changed by additional measur ...


9
Wittich Kaule: Paper of value having an optically variable security element. GAO Gesellschaft fur Automation und Organisation mbH, Bacon & Thomas, September 28, 1993: US05248544 (43 worldwide citation)

A data carrier (1) such as a paper of value or the like having an optically variable element (5, 6), in particular a hologram, applied to the surface, and an additional printed pattern (2), applied in particular by steel intaglio printing, wherein the surface of the data carrier (15, 16, 20, 21) is ...


10
Gerhard Stenzel, Wittich Kaule: Printed security with hallmarks. Gao Gessellschaft fur Automation und Organisation mbH, Neuman Williams Anderson & Olson, May 27, 1986: US04591707 (41 worldwide citation)

This invention relates to a security paper with a hallmark in the form of a coating applied by vacuum deposition techniques to the surface of a paper substrate. The coating is very thin and almost invisible to the naked eye even as a metal layer, although permitting accurate automatic or machine exa ...