Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5330016 | Drill bit and other downhole tools having electro-negative surfaces and sacrificial anodes to reduce mud balling | William C. Paske, Ronald D. Ormsby | 1994-07-19 |
| 5278507 | Well logging method and apparatus providing multiple depth of investigation using multiple transmitters and single receiver pair having depth of investigation independent of formation resistivity | Roger P. Bartel, M. Vikram Rao | 1994-01-11 |