Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7200079 | Optical pickup device and optical element used for the same | Mitsuru Mimori | 2007-04-03 |
| 7193954 | Optical pickup device and objective lens for the optical pickup device | Katsuya Yagi, Yuichi Atarashi, Tohru Kimura | 2007-03-20 |
| 7190658 | Optical element having a plurality of ring-shaped zones | — | 2007-03-13 |
| 7050236 | Diffractive optical element and optical pickup apparatus | — | 2006-05-23 |
| 6856471 | Objective optical element, optical pick-up apparatus, and optical information recording reproducing apparatus | Hidekazu Totsuka, Shinichiro Saito, Katsuya Sakamoto | 2005-02-15 |
| 6728172 | Objective lens and optical pickup apparatus | Koji Honda | 2004-04-27 |