Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5576703 | Method and apparatus for communicating signals from within an encased borehole | Roger N. Samdahl, Thomas R. Bandy | 1996-11-19 |
| 4821326 | Non-audible speech generation method and apparatus | — | 1989-04-11 |
| 4739325 | Apparatus and method for down-hole EM telemetry while drilling | — | 1988-04-19 |
| 4630243 | Apparatus and method for logging wells while drilling | — | 1986-12-16 |
| 4578675 | Apparatus and method for logging wells while drilling | — | 1986-03-25 |
| 4207568 | Underwater communications system | — | 1980-06-10 |