Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691847 | Athermalized and achromatized optical systems employing diffractive optical element | — | 1997-11-25 |
| 5677788 | Two-stage projection system | James D. Zimmerman, David A. Ansley | 1997-10-14 |
| 5652681 | Grism (grating-prism combination) | Ernest W. Gossett | 1997-07-29 |
| 5625499 | Achromatic and apochromatic prism element employing prisms and gratings | — | 1997-04-29 |