Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5154810 | Thin film coating and method | William T. Beauchamp, Robert E. Klinger, John Lehan | 1992-10-13 |
| 5005719 | Tamper evident optical device and article utilizing the same | Roger W. Phillips, Vernon C. Spellman, Wayne L. Gossett, Paul G. Coombs, David W. Todd +1 more | 1991-04-09 |
| 4840281 | Tamper evident optical device and article utilizing the same | Roger W. Phillips, Vernon C. Spellman, Wayne L. Gossett, Paul G. Coombs | 1989-06-20 |
| 4721217 | Tamper evident optically variable device and article utilizing the same | Roger W. Phillips, Vernon C. Spellman, Wayne L. Gossett | 1988-01-26 |
| 4427264 | Mounting for optical antiglare panel and assembly including the same | — | 1984-01-24 |
| 4412255 | Transparent electromagnetic shield and method of manufacturing | Bruce E. Kuhlman | 1983-10-25 |
| 4381421 | Electromagnetic shield for electronic equipment | Warren D. Coats | 1983-04-26 |
| 4351681 | Contrast enhancement filter and method | — | 1982-09-28 |
| 4278736 | Contrast enhancement filter and method | — | 1981-07-14 |