Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818087 | Orthohedral ring laser gyro | — | 1989-04-04 |
| 4813766 | Optical time delay apparatus | Wayne H. Keene, James M. Howell | 1989-03-21 |
| 4813774 | Skewed rhombus ring laser gyro | Irl W. Smith, Hermann Statz | 1989-03-21 |