Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4770255 | Arrangement for underwater drilling of foundations | Herve Barthelemy, Karl Bollinger, Michel Brochier, Yves Legendre | 1988-09-13 |
| 4742876 | Submarine drilling device | Herve Barthelemy, Karl Bollinger, Michel Brochier, Yves Legendre | 1988-05-10 |