Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836318 | Track roller frame assembly | Andrew J. Tonsor, James E. Gee, Samuel B. Stevens | 1989-06-06 |
| 4799201 | Methods and apparatus for reducing correlation sidelobe interference in seismic profiling systems | — | 1989-01-17 |