Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4989824 | Motor block fastening device for a trenching machine | Jean-Claude Detilleux, Philippe Chagnot, Jean-Pierre Schreiber, Andre Ponsada, Philippe Lefort | 1991-02-05 |
| 4971157 | Apparatus for the removal of spoil when making trenches of great depth | Philippe Chagnot, Joseph Dietsch | 1990-11-20 |
| 4882859 | Excavating bucket having scoops | — | 1989-11-28 |
| 4883134 | Milling machine for cutting trenches | Daniel Barre | 1989-11-28 |
| 4770255 | Arrangement for underwater drilling of foundations | Herve Barthelemy, Michel Brochier, Maurice Gau, Yves Legendre | 1988-09-13 |
| 4742876 | Submarine drilling device | Herve Barthelemy, Michel Brochier, Maurice Gau, Yves Legendre | 1988-05-10 |
| 4650012 | Apparatus for cleaning drills | Philippe Chagnot | 1987-03-17 |
| 4519475 | Scaffolding | — | 1985-05-28 |