Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7236448 | Optical information recording medium and information recording method using the recording medium | Yasuhide Fujiwara | 2007-06-26 |
| 7187642 | Optical information recording medium with ROM area having pre-pits | Yasuhide Fujiwara | 2007-03-06 |
| 7106680 | Device and method for recording data to optical disk using multi-pulse to enhance power pulse | Masaki Kato | 2006-09-12 |
| 6982110 | Information recording medium and manufacturing method thereof | Hisamitsu Kamezaki, Yasuhide Fujiwara | 2006-01-03 |
| 6469963 | Optical recording medium and method of information recording/reading an optical recording medium | Toru Yashiro, Eiji Noda | 2002-10-22 |
| 6137769 | Optical recording medium and method of information recording/reading an optical recording medium | Toru Yashiro, Eiji Noda | 2000-10-24 |
| 5384167 | Method for the surface treatment of a metal by atmospheric pressure plasma | Atsushi Nishiwaki, Norihito Ikemiya, Hiroshi Uchiyama, Hideo Inagaki, Kazumi Ogino | 1995-01-24 |
| 5316814 | Optical information recording medium | Toru Yashiro, Yutaka Ueda | 1994-05-31 |
| 4839226 | Magneto-optical recording medium | Hajime Machida | 1989-06-13 |
| 4690861 | Magneto optical recording medium | Hitoshi Nakamura, Yujiro Kaneko, Hajime Machida, Fumiya Omi, Atsuyuki Watada | 1987-09-01 |
| 4389972 | Toner concentration control apparatus | Koji Hirakura, Kenta Watase, Takeshi Iijima | 1983-06-28 |
| 4369733 | Toner concentration control apparatus | Koji Hirakura, Kenta Watase, Takahiko Kitamura | 1983-01-25 |
| 4266141 | Toner developing ability measuring system for electrostatography | Koji Hirakura, Kenta Watase | 1981-05-05 |