Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4982496 | Method of making lug journal for roller cutter drill bits | Steve W. Klappenbach | 1991-01-08 |
| 4599921 | Method and apparatus for machining a workpiece | Joseph Tucker | 1986-07-15 |