Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6523377 | Blocking device for a cylinder lock | — | 2003-02-25 |
| 6041631 | Locking device with a cylinder lock and a flat key | — | 2000-03-28 |
| 5956986 | Locking device with a cylinder lock and a flat key | — | 1999-09-28 |
| 4939915 | Electromechanical locking device | — | 1990-07-10 |
| 4924686 | Contact device for transmitting electrical signals between a lock and key in a cylinder lock | — | 1990-05-15 |
| D307704 | Key | — | 1990-05-08 |
| 4270372 | Key and lock system | Robert Walther | 1981-06-02 |