Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5445230 | Downhole drilling subassembly and method for same | Eric J. Wattenburg | 1995-08-29 |
| 5183119 | Anti-snag plowing system | — | 1993-02-02 |
| 4629357 | Movable barrier | Eric J. Wattenburg | 1986-12-16 |