Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835474 | Method and apparatus for detecting subsurface anomalies | Jorge O. Parra, Bob M. Duff | 1989-05-30 |
| 4801411 | Method and apparatus for producing monosize ceramic particles | Stephen T. Wellinghoff | 1989-01-31 |