Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830520 | Method of protecting a limited-displacement mechanical system against an agressive medium | — | 1989-05-16 |
| 4728124 | Connection for drilling | Herve Righi | 1988-03-01 |
| 4694914 | Drilling string for drilling a bent bore, a method of using said string, and a bending device used in said string | — | 1987-09-22 |
| 4637480 | Azimuth measuring method for non-vertical drilling | Claude Dreuilhe | 1987-01-20 |
| 4597289 | Device for measuring stresses transmitted by a shaft, in particular to a drill bit | — | 1986-07-01 |
| 4565541 | Small deflection coupling for oscillating shafts | — | 1986-01-21 |
| 4554983 | Oscillating friction ring assembly for applying axial thrust to a shaft | — | 1985-11-26 |
| 4512596 | Anti-unscrewing devices | — | 1985-04-23 |
| 4304071 | Safety device for sliding doors | — | 1981-12-08 |