Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7460303 | Directional diffuser | James J. Cowan | 2008-12-02 |
| 6940665 | Directional diffuser | James Cowan | 2005-09-06 |
| 6608722 | Directional diffuser | James Cowan | 2003-08-19 |
| 5793503 | Methods of hologram construction using computer-processed objects | Debby L. Haines | 1998-08-11 |
| 5640255 | Holographic authentication patch | — | 1997-06-17 |
| 5475511 | Methods of hologram construction using computer-processed objects | Debby L. Haines | 1995-12-12 |
| 5237433 | Methods of hologram construction using computer-processed objects | Debby L. Haines | 1993-08-17 |
| 5194971 | Computer aided holography and holographic computer graphics | — | 1993-03-16 |
| 4969700 | Computer aided holography and holographic computer graphics | — | 1990-11-13 |
| 4832445 | Security diffraction devices difficult to exactly duplicate | Robert H. Weller | 1989-05-23 |
| 4778262 | Computer aided holography and holographic computer graphics | — | 1988-10-18 |
| 4429946 | Method and system for constructing a composite hologram | — | 1984-02-07 |
| 4364627 | Method and system for constructing a composite hologram | — | 1982-12-21 |
| 4343874 | Method of constructing a hologram on a photoresist detector | — | 1982-08-10 |
| 4339168 | Holograms created from cylindrical hologram masters | — | 1982-07-13 |
| 4315665 | Composite optical element having controllable light transmission and reflection characteristics | — | 1982-02-16 |
| 4183623 | Tomographic cross-sectional imaging using incoherent optical processing | — | 1980-01-15 |