Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4762344 | Well casing connection | James J. Petrella | 1988-08-09 |
| 4200158 | Fluid retarded accelerating jar with negative and positive pressure chambers | — | 1980-04-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4762344 | Well casing connection | James J. Petrella | 1988-08-09 |
| 4200158 | Fluid retarded accelerating jar with negative and positive pressure chambers | — | 1980-04-29 |