Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4610309 | Downhole tool | John T. O'Brien, Gary M. Hoover | 1986-09-09 |
| 4300220 | Three component detector and housing for same | John T. O'Brien | 1981-11-10 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4610309 | Downhole tool | John T. O'Brien, Gary M. Hoover | 1986-09-09 |
| 4300220 | Three component detector and housing for same | John T. O'Brien | 1981-11-10 |