Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6377520 | Robust and versatile focus/tracking method and system for optical pickup heads | Mark O. Freeman, Jinn-Kang Wang | 2002-04-23 |
| 6369377 | Multiple-beam holographic optical pick-up head | Jau-Jiu Ju, Tzu-Ping Yang, Wei Lu, Mark O. Freeman, Der-Ray Huang +1 more | 2002-04-09 |