Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5880814 | Visual acuity tester with improved test character generation | Robert Nelson McKnight, John Donal Starr, Kurt Paul Tolksdorf | 1999-03-09 |
| 5121981 | Visual acuity tester | Robert Nelson McKnight | 1992-06-16 |
| 5026151 | Visual function tester with binocular vision testing | Robert Nelson McKnight, Eliezer Peli | 1991-06-25 |
| 4784483 | Brightness acuity tester | Jack T. Holladay | 1988-11-15 |
| 4367015 | Control means for optical instrumentation | David L. Guyton | 1983-01-04 |