Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5113940 | Well apparatuses and anti-rotation device for well apparatuses | — | 1992-05-19 |
| 5025858 | Well apparatuses and anti-rotation device for well apparatuses | — | 1991-06-25 |
| 4508167 | Selective casing bore receptacle | Roger A. Weinberg | 1985-04-02 |
| 4405017 | Positive locating expendable plug | Richard G. Allen | 1983-09-20 |