Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8216656 | Disc master, disc master manufacturing method, stamper, disc substrate, optical disc, and optical disc manufacturing method | Takashi Matsubara | 2012-07-10 |
| 8164992 | Optical disc medium and data recording method and apparatus | Yoshinobu Usui, Akiya Saito, Makoto Tsukahara | 2012-04-24 |
| 7911929 | Optical disk read only memory | Tetsuhiro Sakamoto, Jun Nakano, Takayuki Asahina, Hideo Kawachi, Makoto Tsukahara +1 more | 2011-03-22 |
| 7852730 | Optical disk medium, and data recording method and device | Yoshinobu Usui, Akiya Saito, Makoto Tsukahara | 2010-12-14 |
| 7236439 | Optical disc medium and data recording method and apparatus | Yoshinobu Usui, Akiya Saito, Makoto Tsukahara | 2007-06-26 |
| 5914495 | Inspection apparatus for inspecting a defect of an optical disc | Shigeki Ishizuka, Koichi Sato, Akira Nikami, Mitsuru Sato | 1999-06-22 |
| 5846626 | Optical recording medium and method of producing same | Toshiyuki Kashiwagi, Motohiro Furuki, Shoji Fukuchi | 1998-12-08 |
| 5646415 | Apparatus for detecting a defect of an optical disc based on sensor outputs for adjacent positions | — | 1997-07-08 |
| 5445853 | Optical data storage media | Yoko Hayashi, Shin-Ichiro Tamura, Takao Murooka | 1995-08-29 |
| 5409756 | Optical disc with corrosion-resistant metallic reflective layer | Jiro Ikeda | 1995-04-25 |