Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5214614 | Seismic directional sensor for solid-borne sound | — | 1993-05-25 |
| 4849947 | Acoustic ground vibration detector | Manfred Borgers | 1989-07-18 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5214614 | Seismic directional sensor for solid-borne sound | — | 1993-05-25 |
| 4849947 | Acoustic ground vibration detector | Manfred Borgers | 1989-07-18 |