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Patent applications and USPTO patent grants for Chang; Xiangyun.The latest application filed is for "photocathode enhancement system".
Patent | Date |
---|---|
Floating grid electron source Grant 9,196,449 - Chang November 24, 2 | 2015-11-24 |
Photocathode enhancement system Grant 9,159,517 - Chang October 13, 2 | 2015-10-13 |
Multi-dimensional photocathode system Grant 8,907,297 - Chang December 9, 2 | 2014-12-09 |
Photocathode Enhancement System App 20140152175 - CHANG; Xiangyun | 2014-06-05 |
Multi-dimensional Photocathode System App 20140152176 - CHANG; Xiangyun | 2014-06-05 |
Secondary emission electron gun using external primaries Grant 7,227,297 - Srinivasan-Rao , et al. June 5, 2 | 2007-06-05 |
Secondary emission electron gun using external primaries App 20060033417 - Srinivasan-Rao; Triveni ;   et al. | 2006-02-16 |
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