Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4933918 | Apparatus for frightening noxious animals by means of ultrasonic signals | Klaus Piper | 1990-06-12 |
| 4235272 | Snow anti-skid device for a motor vehicle wheel | — | 1980-11-25 |