Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4672891 | Method of producing an identification card | Thomas Maurer | 1987-06-16 |
| 4629630 | Check paper that is protected against forgery and tampering | — | 1986-12-16 |
| 4597592 | Identification card with duplicate data | Thomas Maurer | 1986-07-01 |
| 4544181 | Identification card | Thomas Maurer, Wolfgang Gauch | 1985-10-01 |
| 4504083 | Guilloche identification card | Wolfgang Gauch | 1985-03-12 |
| 4496961 | Check paper that is protected against forgery and tampering | — | 1985-01-29 |