Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5189262 | Advanced motor driven clamped borehole seismic receiver | Bruce P. Engler, Gerard E. Sleefe | 1993-02-23 |
| 5031717 | Advanced downhole periodic seismic generator | Harry C. Hardee, Richard G. Hills | 1991-07-16 |
| 4805727 | Down hole periodic seismic generator | Harry C. Hardee, Richard G. Hills | 1989-02-21 |
| 4547080 | Convective heat flow probe | James C. Dunn, Harry C. Hardee | 1985-10-15 |