Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5315440 | Zoom lens having weak front lens group | Ellis I. Betensky | 1994-05-24 |
| 5309283 | Hybrid, color-corrected, projection TV lens system | — | 1994-05-03 |
| 5268792 | Zoom lens | Jacob Moskovich | 1993-12-07 |
| 4936661 | Zoom lens with short back focal length | Ellis I. Betensky, Jacob Moskovich | 1990-06-26 |
| 4900139 | Color corrected projection lens | — | 1990-02-13 |
| 4838668 | Zoom lens | Ellis I. Betensky | 1989-06-13 |
| RE32923 | Zoom lens | — | 1989-05-16 |
| 4828372 | Wide-angle zoom lens | Ellis I. Betensky | 1989-05-09 |
| 4818082 | Compact wide-angle close-focus SLR zoom lens | — | 1989-04-04 |
| 4757372 | SLR zoom camera | Ellis I. Betensky, Jacob Moskovich | 1988-07-12 |
| 4659188 | Zoom lens | — | 1987-04-21 |
| 4655562 | Objective lens system, relay lens system, and eyepiece lens system for night-vision goggles | Ellis I. Betensky | 1987-04-07 |
| 4523816 | Catadioptric lens | — | 1985-06-18 |
| 4367928 | Wide angle lens attachment | Muh-fa Chen | 1983-01-11 |
| 4359272 | Internal focusing telephoto lens | — | 1982-11-16 |
| 4333714 | Compact wide angle lens | — | 1982-06-08 |
| 4307943 | Close focusing zoom lens | Ellis I. Betensky | 1981-12-29 |
| 4303315 | Compact wide angle lens | — | 1981-12-01 |
| 4256381 | Zoom lens | — | 1981-03-17 |
| 4182549 | Compact wide angle lens | — | 1980-01-08 |