Hu; Charles C.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Hu; Charles C..The latest application filed is for "zero crossing circuit for a relay".
- Hu; Charles C. - Saratoga CA
- Hu; Charles C - Saratoga CA
- Hu; Charles C. - San Jose CA
| Patent | Date |
|---|---|
| Zero crossing circuit for a relay Grant 5,804,991 - Hu September 8, 1 | 1998-09-08 |
| Wall-mounted switch Grant D380,452 - Mix , et al. July 1, 1 | 1997-07-01 |
| Moveable desktop load controller Grant 5,598,042 - Mix , et al. January 28, 1 | 1997-01-28 |
| Light level controller Grant D369,348 - Hu April 30, 1 | 1996-04-30 |
| Moveable desktop light controller Grant 5,455,487 - Mix , et al. October 3, 1 | 1995-10-03 |
| Motion sensor Grant D360,842 - Hu August 1, 1 | 1995-08-01 |
| Apparatus and method for adjusting lights according to the level of ambient light Grant 5,406,173 - Mix , et al. April 11, 1 | 1995-04-11 |
| Dual technology motion sensor Grant 5,189,393 - Hu February 23, 1 | 1993-02-23 |
| Shutoff circuit for sensor controlled switch Grant 5,124,566 - Hu June 23, 1 | 1992-06-23 |
| Method and apparatus for refracting light to an optical detector Grant 5,124,546 - Hu June 23, 1 | 1992-06-23 |
| Low voltage motion sensor for activating a high voltage load Grant 4,820,938 - Mix , et al. April 11, 1 | 1989-04-11 |
| Occupancy sensor Grant D294,231 - Cameron, Jr. , et al. February 16, 1 | 1988-02-16 |
| Occupancy sensor Grant 4,661,720 - Cameron, Jr. , et al. April 28, 1 | 1987-04-28 |
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