Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7379406 | Optical recording apparatus, and method for controlling laser power therein by filtering and then sampling a returned light signal | Kenji Nagashima, Eiji Kumagai, Satoshi Kumai | 2008-05-27 |
| 6819642 | Data recording device, data reproducing device, and optical disc | Satoshi Kumai, Tetsuji Kawashima, Eiji Kumagai, Kenji Nagashima | 2004-11-16 |
| 6757227 | Optical drive apparatus for use with different recording media, tracking control method for use therein, and optical disc | Eiji Kumagai, Kenji Nagashima | 2004-06-29 |
| 6614736 | Optical disc drive, and recording/reproducing method | Michihiko Iida, Kunihiko Miyake | 2003-09-02 |