Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4896953 | Anamorphic wide angle safety lens | — | 1990-01-30 |
| 4895428 | High efficiency retroreflective material | John C. Nelson | 1990-01-23 |
| 4805984 | Totally internally reflecting light conduit | — | 1989-02-21 |
| 4476593 | Tanning blanket | Dan L. Fanselow, Ronald E. Bergsten | 1984-10-16 |
| 4206969 | Directional front projection screen | Terrence M. Conder, Dennis F. Vanderwerf | 1980-06-10 |