Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5358089 | Plastic escalator step | — | 1994-10-25 |
| 4910512 | Monitoring equipment for the safety devices used in vehicles when driving in reverse | — | 1990-03-20 |
| 4792764 | Noncontact electronic switching arrangement | Heinz Walker | 1988-12-20 |