Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5241337 | Real image viewfinder requiring no field lens | Paul L. Ruben | 1993-08-31 |
| 5182592 | Real image zoom viewfinder | Paul L. Ruben | 1993-01-26 |
| 4991943 | Compact zoom lens with high zoom ratio | — | 1991-02-12 |
| 4936661 | Zoom lens with short back focal length | Melvyn H. Kreitzer, Jacob Moskovich | 1990-06-26 |
| 4838668 | Zoom lens | Melvyn H. Kreitzer | 1989-06-13 |
| 4828372 | Wide-angle zoom lens | Melvyn H. Kreitzer | 1989-05-09 |
| 4815831 | Projection lens with color correction | — | 1989-03-28 |
| 4801196 | Wide angle projection lens | — | 1989-01-31 |
| 4757372 | SLR zoom camera | Melvyn H. Kreitzer, Jacob Moskovich | 1988-07-12 |
| 4749268 | Autofocusing zoom lens | Jacob Moskovich | 1988-06-07 |
| 4707084 | Projection lens | — | 1987-11-17 |
| 4697892 | Projection lens | — | 1987-10-06 |
| 4655562 | Objective lens system, relay lens system, and eyepiece lens system for night-vision goggles | Melvyn H. Kreitzer | 1987-04-07 |
| 4526442 | Compact projection lens | — | 1985-07-02 |
| 4466708 | Zoom lens | — | 1984-08-21 |
| 4427883 | Optical sensing system for extensible tape rules | William J. Hildebrandt | 1984-01-24 |
| 4394072 | Zoom lens | — | 1983-07-19 |
| 4348081 | Projection lens | — | 1982-09-07 |
| 4307943 | Close focusing zoom lens | Melvyn H. Kreitzer | 1981-12-29 |
| 4304466 | Zoom lens | — | 1981-12-08 |
| 4300817 | Projection lens | — | 1981-11-17 |
| 4299454 | Wide angle to long focus zoom lens | — | 1981-11-10 |