Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5080179 | Down the hole hammer equipment | Bernard Lionel Gien | 1992-01-14 |
| 5065823 | Extraction device for pneumatically actuated drilling tools | Bernard Lionel Gien | 1991-11-19 |
| 4753302 | Valveless pneumatic hammer | Bernard Lionel Gien | 1988-06-28 |