Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198912 | Volume phase hologram with liquid crystal in microvoids between fringes | Richard T. Ingwall, Duncan H. Whitney | 1993-03-30 |
| 4970129 | Holograms | Richard T. Ingwall | 1990-11-13 |