Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4729675 | Downhole motor and bearing assembly | William C. Maurer | 1988-03-08 |
| 4232751 | In-hole motor drill with bit clutch | — | 1980-11-11 |
| 4199201 | Bearing assembly with adjustable lock nut | — | 1980-04-22 |