Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4968100 | Expansion fracture device | — | 1990-11-06 |
| 4492002 | Floor cleaning machine | Steven J. A. Waldhauser | 1985-01-08 |
| 4380844 | Automatic floor cleaning machine | Steven Waldhauser | 1983-04-26 |