Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6958703 | Drill string enabling information to be transmitted | — | 2005-10-25 |
| 6952170 | Hollow drilling rod for transmitting information | — | 2005-10-04 |
| 4634860 | Device for determining the position of a moving part and drilling machine including such a device | Jean-Pierre Hamelin | 1987-01-06 |
| 4581922 | Method of and device for obtaining the peak value of a signal and application to a method of and device for determining the hardness of a soil | — | 1986-04-15 |