Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5148110 | Method and apparatus for passively detecting the depth and location of a spatial or temporal anomaly by monitoring a time varying signal emanating from the earths surface | — | 1992-09-15 |
| 4825165 | Method and apparatus for detecting a transient phenomenon by monitoring variations of an alternating component of a vertical current emanating from the earth's surface | Claude V. Swanson | 1989-04-25 |
| 4507611 | Method for detecting surface and subsurface anomalies of the earth using vertical current measurements | — | 1985-03-26 |