Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5455645 | Refractometer for measuring spherical refractive errors | Ian B. Berger | 1995-10-03 |
| 5239416 | Variable power zoom stand magnifier | — | 1993-08-24 |
| 5028127 | Wafer thin reading telescope | — | 1991-07-02 |
| 4923282 | Magnifying apparatus and method | — | 1990-05-08 |
| 4795235 | Bioptic periscope and method | — | 1989-01-03 |