Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5992559 | Reversible polarity borehole seismic device for P and enhanced S-wave crosshole testing | — | 1999-11-30 |
| 5305287 | High-frequency borehole seismic source | Richard D. Rechtien, Kurt L. Hambacker | 1994-04-19 |