Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5208447 | Method for testing a terminal communicating with chip cards | — | 1993-05-04 |
| 5148007 | Method for generating random number for the encoded transmission of data | — | 1992-09-15 |
| 5072102 | Reader apparatus for chip cards | — | 1991-12-10 |
| 4974193 | Circuit arrangement for protecting access to a data processing system with the assistance of a chip card | Albrecht Beutelspacher, Annette-Gabriele Kersten | 1990-11-27 |
| 4951247 | Data exchange system comprising a plurality of user terminals each containing a chip card reading device | Albrecht Beutelspacher, Annette-Gabriele Kersten | 1990-08-21 |
| 4786790 | Data exchange system with authentication code comparator | Albrecht Beutelspacher, Annette-Gabriele Kersten | 1988-11-22 |