Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6985163 | Color display device | George Herbert Needham Riddle, Glenn A. Reitmeier, Carl C. Steinmetz, Herschel Clement Burstyn | 2006-01-10 |
| 6797204 | Method of determining wear | Robert Swain | 2004-09-28 |
| 6306319 | Method of determining wear | Robert Swain | 2001-10-23 |
| 5012431 | Objective color notation system | — | 1991-04-30 |
| 4310314 | Reflected color simulator | Philip R. Worn, Donald R. Hall | 1982-01-12 |