Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5351765 | Coring assembly and method | — | 1994-10-04 |
| 5330016 | Drill bit and other downhole tools having electro-negative surfaces and sacrificial anodes to reduce mud balling | William C. Paske, Paul F. Rodney | 1994-07-19 |