Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D621689 | Key card with frame | — | 2010-08-17 |
| 7100833 | Mechanical device to encode magnetic cards | — | 2006-09-05 |
| 7080533 | Lock and magnetically coded card | — | 2006-07-25 |
| 6840071 | Magnetic key-operated locks | — | 2005-01-11 |
| 5854844 | Commentary systems | — | 1998-12-29 |
| 5707090 | Magnetic card-operated door closure | — | 1998-01-13 |
| 5664449 | Magnetic locks | — | 1997-09-09 |
| 5406815 | Magnetic key operated code-change lock | — | 1995-04-18 |
| 5388437 | Magnetic key operated lock | — | 1995-02-14 |
| 5267459 | Magnetic key operated lock | — | 1993-12-07 |
| 4676083 | Locking mechanism with actuator | Armin Eisermann | 1987-06-30 |
| 4312198 | Magnetic key operated hotel door lock | — | 1982-01-26 |