Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868408 | Portable water-powered electric generator | — | 1989-09-19 |
| 4844156 | Method of secondary extraction of oil from a well | — | 1989-07-04 |
| 4534574 | Lightweight chuck for woodturning lathe | Edward F. Groh | 1985-08-13 |