Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7358470 | Optical pickup | Tsung-Min Yang | 2008-04-15 |
| 7078674 | Optical pickup device emitting linear polarized light with a 45 degree phase difference | — | 2006-07-18 |
| 6377520 | Robust and versatile focus/tracking method and system for optical pickup heads | Mark O. Freeman, Hsi-Fu Shih | 2002-04-23 |
| 6211511 | Dual-wavelength optical pickup head | Hsi-Fu Shih, Tzu-Ping Yang, Mark O. Freeman | 2001-04-03 |
| 6188132 | Two-wavelength semiconductor laser diode package for use on the read/write head of an optical drive capable of reading different types of optical discs | Hsi-Fu Shih, Tzu-Ping Yang, Mark O. Freeman | 2001-02-13 |