Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887881 | Plugging apparatus for the transmission of electrical energy | — | 1989-12-19 |
| 4257030 | Electronically coded cylinder lock and key | Rolf Bruhin | 1981-03-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887881 | Plugging apparatus for the transmission of electrical energy | — | 1989-12-19 |
| 4257030 | Electronically coded cylinder lock and key | Rolf Bruhin | 1981-03-17 |