Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857867 | Method and apparatus for locking the frequency and phase of a local oscillator | — | 1989-08-15 |
| 4858199 | Method and apparatus for cancelling nonstationary sinusoidal noise from seismic data | — | 1989-08-15 |
| 4853903 | Method and apparatus for removing sinusoidal noise from seismic data | Andrew F. Linville, Jr., Thomas E. Shirley | 1989-08-01 |