Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346016 | Apparatus and method for centralizing pipe in a wellbore | Dennis R. Wilson, Wilber R. Moyer, Larry K. Moran | 1994-09-13 |
| 5321213 | Downhole epicyclic motion orbital seismic source | Paul L. Buller, John B. Sinton, Marvin E. Janda | 1994-06-14 |
| 5285023 | Downhole hydraulic rotary seismic source | Marvin E. Janda | 1994-02-08 |