Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7029141 | Lighted bow site device | Robert J. Skelly | 2006-04-18 |
| 4890681 | Method and apparatus for rotary power driven swivel drilling | — | 1990-01-02 |
| 4832552 | Method and apparatus for rotary power driven swivel drilling | — | 1989-05-23 |
| 4610139 | Hydraulic speed control and braking apparatus for draw works | — | 1986-09-09 |
| 4488576 | Directional flow control valve | — | 1984-12-18 |
| 4448215 | Multiple flow control valve | — | 1984-05-15 |
| 4330008 | Multiple flow and directional control valve | — | 1982-05-18 |
| 4219049 | Multiple flow selection valve | — | 1980-08-26 |