Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4219810 | Frequency division multiplex digital seismic telemetry system | — | 1980-08-26 |
| 4218767 | Transmission line seismic communications system | Carl F. Mart, John W. Miller, Otice E. Brown | 1980-08-19 |