Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |