Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5271468 | Downhole tool apparatus with non-metallic components and methods of drilling thereof | Steven G. Streich, Donald F. Hushbeck, Kevin T. Berscheidt | 1993-12-21 |
| 5224540 | Downhole tool apparatus with non-metallic components and methods of drilling thereof | Steven G. Streich, Donald F. Hushbeck, Kevin T. Berscheidt | 1993-07-06 |