Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5972459 | Optical recording medium and optical disk apparatus | Osamu Kawakubo, Toshiyuki Kashiwagi, Koichi Yasuda, Masahiko Kaneko, Mitsuo Naito | 1999-10-26 |
| 5846626 | Optical recording medium and method of producing same | Toshiyuki Kashiwagi, Shoji Fukuchi, Yoshitake Yanagisawa | 1998-12-08 |
| 5708652 | Multi-layer recording medium and method for producing same | Hiroshi Ohki, Toshiyuki Kashiwagi | 1998-01-13 |