Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4537067 | Inertial borehole survey system | Leo Spiegel, Richard M. Masters, Elmer J. Frey, John R. Howatt, Gary E. Walker | 1985-08-27 |
| 4505048 | Borehole survey instrument | — | 1985-03-19 |
| 4485563 | Borehole survey instrument | John W. Linn, III, Emil S. Macha, Miles A. Smither | 1984-12-04 |
| 4480391 | Borehole survey instrument control circuitry | Miles A. Smither | 1984-11-06 |
| 4454756 | Inertial borehole survey system | Leo Spiegel, Richard M. Masters, Elmer J. Frey, John R. Howatt, Gary E. Walker | 1984-06-19 |