Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4715232 | Flow measuring system with backflow preventing means | — | 1987-12-29 |
| 4333674 | Vehicle bumpers with collapsible parts | John S. Hill | 1982-06-08 |
| 4225167 | Vehicle bumpers with collapsible parts | John S. Hill | 1980-09-30 |