Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5602656 | Apparatus and method for monitoring holographic light protection filters | John E. Wreede, Richard B. Upper, Darrell F. Hatch, Stephen T. Babbitt | 1997-02-11 |
| 4923771 | Diamond-shaped mask for making multiple exposure holograms | — | 1990-05-08 |
| 4889780 | Multiple exposure hologram for minimizing crosstalk | — | 1989-12-26 |