Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5109735 | High strength quick change key type installation tool | — | 1992-05-05 |
| 4297063 | Telescoping self-retaining safety bolt assembly | — | 1981-10-27 |
| 4285377 | Safety bolt | — | 1981-08-25 |
| 4278120 | Safety bolt | Josef F. Volkmann | 1981-07-14 |