Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4762186 | Medium curvature directional drilling method | James A. Dech, David D. Hearn, Frank J. Schuh | 1988-08-09 |
| 4601353 | Method for drilling drainholes within producing zone | Frank J. Schuh | 1986-07-22 |