Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6318758 | Security document with a security component and method for the production thereof | Wittich Kaule | 2001-11-20 |
| 5897746 | Method for equipping papers of value with authenticity features | Thomas Attenberger, Dieter Stein, Wilhelm Ilgmann | 1999-04-27 |
| 5801857 | Data carrier having an optically variable element and methods for producing it | Christoph Heckenkamp, Wittich Kaule | 1998-09-01 |
| 5798929 | Apparatus and method for processing thin sheet material such as bank notes | Bodo Albert, Klaus Buchmann, Alfred Schmidt | 1998-08-25 |
| 5617956 | Apparatus for sorting and stacking sheet material | Frank Werner, Herbert Maul | 1997-04-08 |
| 5509691 | Security element in the form of threads or strips to be embedded in security documents and a method for producing and testing the same | Wittich Kaule, Wilhelm Ilgmann, Gerhard Schwenk | 1996-04-23 |
| 5483602 | Method and apparatus for detecting printed images on documents by testing for the presence in the images of structural elements having defined regularities which are recognizable by the eye and common to a variety of documents | Wittich Kaule | 1996-01-09 |
| 5433807 | Method of producing a document with an unforgeable surface relief | Christoph Heckenkamp, Wittich Kaule | 1995-07-18 |
| 5324079 | Security document having a security thread embedded therein | Wittich Kaule, Wilhelm Ilgmann, Gerhard Schwenk | 1994-06-28 |
| 5112672 | Security document having an electrically conductive security element embedded therein | Wittich Kaule, Wilhelm Ilgmann, Gerhard Schwenk | 1992-05-12 |
| 5055032 | A burner with a flame retention device | Detlef Altemark, Manfred Weid | 1991-10-08 |
| 4988126 | Document with an unforgeable surface | Christoph Heckenkamp, Wittich Kaule | 1991-01-29 |
| 4982073 | Token such as a credit or identification card and an apparatus for testing the token or card | — | 1991-01-01 |
| 4926031 | Token such as credit or identification card and an apparatus for testing the token or card | — | 1990-05-15 |
| 4892336 | Antifalsification document having a security thread embedded therein and a method for producing the same | Wittich Kaule, Jürgen Moll, Gerhard Schwenk | 1990-01-09 |
| 4756557 | Security document having a security thread embedded therein and methods for producing and testing the authenticity of the security document | Wittich Kaule, Jürgen Moll, Gerhard Schwenk | 1988-07-12 |
| 4691940 | Printed security with hallmarks | Wittich Kaule | 1987-09-08 |
| 4650319 | Examining method for the wear-condition of data carriers | Wittich Kaule | 1987-03-17 |
| 4598205 | 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 | Wittich Kaule | 1986-07-01 |
| 4591707 | Printed security with hallmarks | Wittich Kaule | 1986-05-27 |
| 4533244 | Process for authenticity determination of security documents with security features in the form of luminescing substances | Wittich Kaule, Gerhard Schwenk | 1985-08-06 |
| 4527051 | Token such as credit or identification card and an apparatus for testing the token or card | — | 1985-07-02 |
| 4516031 | Method of determining the degree of wear of bank-notes and a device for carrying out this method | Wittich Kaule, Walter Renz | 1985-05-07 |
| 4463970 | Security paper having camouflage materials to protect its authenticity features | Wittich Kaule, Gerhard Schwenk | 1984-08-07 |
| 4452843 | Security paper | Wittich Kaule, Gerhard Schwenk | 1984-06-05 |