Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4666167 | Stress bushing for profile-stressing objects | Hans P. Hofmann | 1987-05-19 |
| 4610441 | Expansion sleeve for applying precise circumferential stress | Hans P. Hofmann | 1986-09-09 |