Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5031717 | Advanced downhole periodic seismic generator | Harry C. Hardee, Richard P. Striker | 1991-07-16 |
| 4805727 | Down hole periodic seismic generator | Harry C. Hardee, Richard P. Striker | 1989-02-21 |