Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6572946 | Optical disc | — | 2003-06-03 |
| 6169721 | Two-disc laminated optical recording medium | Toshihiko Takishita, Shigenori Murakami, Atsushi Kondo, Ayumi Mitsumori, Miki Kusama +1 more | 2001-01-02 |
| 5827593 | Disc substrate used for an optical disc and a molding die for molding the same | Haruhisa Maruyama, Masaaki Motokawa | 1998-10-27 |
| 5824385 | Optical disc and method for manufacturing the same | Masahide Itoigawa, Yoshitaka Nonaka, Junichi Watanabe, Haruhisa Maruyama | 1998-10-20 |
| 5820961 | Laminated optical discs | Haruhisa Maruyama, Masaaki Motokawa | 1998-10-13 |
| 5759332 | Process of reproducing optical discs and optical discs produced by the same | Masahide Itoigawa, Mitsuhiko Sasano, Masaaki Motokawa, Yoshikazu Hirai, Haruhisa Maruyama | 1998-06-02 |
| 5475667 | Method for inspecting an optical disc | Kenji Kamimura | 1995-12-12 |