Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6140778 | Low pressure xenon lamp and driver circuitry for use in theatrical productions and the like | David A. Pringle, David McDonald, Zhong Yan | 2000-10-31 |
| 5982112 | Low pressure xenon lamp and driver circuitry for use in theatrical productions and the like | David A. Pringle, David McDonald, Zhong Yan | 1999-11-09 |
| 4709888 | Hanger apparatus for electrical conduit and the like | Harry T. Cubit | 1987-12-01 |
| 4301122 | Recovery of uranium from phosphate ores | — | 1981-11-17 |
| 4211756 | Synthesis of zeolite S | — | 1980-07-08 |
| 4194969 | Ore beneficiation process | Harold S. Chung, Tracy J. Huang | 1980-03-25 |
| 4191639 | Process for deasphalting hydrocarbon oils | Costandi A. Audeh | 1980-03-04 |