Issued Patents All Time
| 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, Toshio Morizumi | 2008-05-27 |
| 6819642 | Data recording device, data reproducing device, and optical disc | Tetsuji Kawashima, Eiji Kumagai, Kenji Nagashima, Toshio Morizumi | 2004-11-16 |
| 6678226 | Data recording method and data recording apparatus | Yoshihiro Horibata, Norichika Mine | 2004-01-13 |
| 6614745 | Recording apparatus and recording medium | Toru Takeda, Ayumi Konishi, Junichi Suzuki | 2003-09-02 |