Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673765 | Downhole drilling subassembly and method for same | Willard H. Wattenburg | 1997-10-07 |
| 5445230 | Downhole drilling subassembly and method for same | Willard H. Wattenburg | 1995-08-29 |
| 4629357 | Movable barrier | Willard H. Wattenburg | 1986-12-16 |