Yuen; Sik Hing
Patent Applications and Registrations
Patent applications and USPTO patent grants for Yuen; Sik Hing.The latest application filed is for "dimmable thermally controlled safety light emitting diode illumination device".
- Yuen; Sik Hing - Foster City CA
- Yuen; Sik Hing - Shatin HK
| Patent | Date |
|---|---|
| Dimmable thermally controlled safety light emitting diode illumination device App 20110285308 - Crystal; Bonnie A. ; et al. | 2011-11-24 |
| High efficiency low cost safety light emitting diode illumination device App 20110128742 - Yuen; Pui Hang ; et al. | 2011-06-02 |
| High efficiency low cost safety light emitting diode illumination device App 20090175041 - Yuen; Pui Hang ; et al. | 2009-07-09 |
| Expandable object tracking system and devices Grant 6,891,471 - Yuen , et al. May 10, 2 | 2005-05-10 |
| Expandable object tracking system and devices App 20040203859 - Yuen, Pui Hang ; et al. | 2004-10-14 |
| Digitally temperature compensated voltage-controlled oscillator tunable to different frequency channels Grant 5,912,595 - Ma , et al. June 15, 1 | 1999-06-15 |
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