Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5757177 | Infrasonic frequency resonant circuit and method for use thereof | — | 1998-05-26 |
| 5625348 | Method and apparatus for detecting local precursor seismic activity | Larry A. Park | 1997-04-29 |