Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5969792 | Variable luminance contrast sensitivity and glare vision test process | — | 1999-10-19 |
| 5552842 | Process and apparatus for generating comparison image representative of actual subject view | Lawrence P. Tessler, Craig Fries, Jonathan Tifft | 1996-09-03 |
| 5500699 | Spatial frequency and contrast sensitivity test chart and protocol | — | 1996-03-19 |
| 5414479 | Spatial frequency and contrast sensitivity test chart and protocol | — | 1995-05-09 |
| 4859052 | Portable screen assembly for visual acuity testing | Diana R. McFarland, Robert P. Ginsburg | 1989-08-22 |
| 4800404 | Apparatus and method for testing visual sensitivity to glare | David W. Evans, Kenneth Blauvelt | 1989-01-24 |
| 4789234 | Apparatus and method for testing the motion contrast visual sensitivity of an individual | David Ginsburg, Robert P. Ginsburg | 1988-12-06 |
| 4426663 | Real-time optical filtering method with improved filtered image detection and bandwidth adjustment | David W. Evans | 1984-01-17 |
| 4365873 | Spatial frequency and contrast sensitivity test chart | — | 1982-12-28 |