Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7481535 | Complete autorefractor system in an ultra-compact package | Leonard Schupak, Charles E. Campbell | 2009-01-27 |
| 7001020 | Complete autorefractor system in an ultra-compact package | Leonard Schupak, Charles E. Campbell | 2006-02-21 |
| 5684561 | Device and method for evaluation of refraction of the eye | — | 1997-11-04 |
| 5576780 | Method for evaluation of length of focus of the eye | — | 1996-11-19 |
| 5329322 | Palm size autorefractor and fundus topographical mapping instrument | — | 1994-07-12 |
| 4257689 | Pulse pattern visual acuity device | — | 1981-03-24 |