Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7681849 | Grip tip | — | 2010-03-23 |
| 7159830 | Grip tip | — | 2007-01-09 |
| 4326108 | Hook switch for telephone instruments | Helmut Barkow | 1982-04-20 |
| 4225857 | Spring loop door and window alarm switch | — | 1980-09-30 |