Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5007031 | Apparatus for positioning geophones in shallow holes | — | 1991-04-09 |
| 4813029 | Geophone apparatus and a seismic exploration method | Walter R. Fillippone | 1989-03-14 |
| 4754438 | Geophone testing apparatus | — | 1988-06-28 |
| 4327814 | Rotating eccentric weight apparatus and method for generating coded shear wave signals | — | 1982-05-04 |
| 4302825 | Rotating eccentric weight apparatus and method for generating coded shear wave signals | — | 1981-11-24 |
| 4234053 | Seismic exploration method using a rotating eccentric weight seismic source | — | 1980-11-18 |