Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6556144 | Method and apparatus for data communication with an underground instrument package | Edward Thomas Fraser, Sr., Fred Earnest | 2003-04-29 |
| 5230387 | Downhole combination tool | Robert L. Waters, Philip H. Walters, Howard C. Clark, Don D. Fitzgerald, Otis V. Stelly, II | 1993-07-27 |
| 5064006 | Downhole combination tool | Robert L. Waters, Philip H. Walters, Howard C. Clark, Don D. Fitzgerald, Otis V. Stelly, II | 1991-11-12 |
| 4875014 | System and method for locating an underground probe having orthogonally oriented magnetometers | Philip H. Walters | 1989-10-17 |