Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7729644 | Toner cartridge | Michael A. Kleiter, Kin Yip Ho, Zhi Ya He | 2010-06-01 |
| 6392503 | Half-sawtooth microstrip directional coupler | — | 2002-05-21 |
| 5173808 | Optical filter | Willem F. Auer, John A. Brown | 1992-12-22 |
| 4826286 | Filter with three-band transmission for good seeing | — | 1989-05-02 |
| 4824246 | Colored object which exhibits improved constancy of color appearance upon change of illuminants and method | — | 1989-04-25 |
| 4653925 | Method and apparatus for measuring any of a large number of characteristics of lamplight | — | 1987-03-31 |
| 4431942 | Color-corrected hid mercury-vapor lamp having good color rendering and a desirable emission color | — | 1984-02-14 |
| 4360758 | High-intensity-discharge lamp of the mercury-metal halide type which efficiently illuminates objects with excellent color appearance | Daniel A. Larson, Edward Chen | 1982-11-23 |
| 4341978 | High-intensity-discharge lamp with improved color rendition of illuminated objects | Daniel A. Larson | 1982-07-27 |
| 4334782 | Method and apparatus for expressing relative brightness of artificial illumination as perceived by the average observer | Edward Chen, Edward W. Morton, Dorothy Rachko | 1982-06-15 |
| 4315193 | High-pressure mercury-vapor lamp which has both improved color rendition and light output | — | 1982-02-09 |