Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7918307 | Accelerated weight drop for use as a seismic energy source and a method of operation thereof | — | 2011-04-05 |
| 7395897 | Accelerated weight drop configurable for use as a shear wave seismic energy source and a method of operation thereof | Allen L. Gilmer | 2008-07-08 |
| 7284636 | Accelerated weight drop for use as a seismic energy source and a method of operation thereof | — | 2007-10-23 |