Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6312547 | Method for manufacturing optical disks | Jiro Fujimori, Masaaki Motokawa | 2001-11-06 |
| 6136133 | Method of producing optical disc of bonded type | Jiro Fujimori, Masaaki Motokawa | 2000-10-24 |
| 6132545 | Method of producing an optical video disc | Masaaki Motokawa | 2000-10-17 |
| 5827593 | Disc substrate used for an optical disc and a molding die for molding the same | Masaaki Motokawa, Shinichi Hanzawa | 1998-10-27 |
| 5824385 | Optical disc and method for manufacturing the same | Masahide Itoigawa, Shinichi Hanzawa, Yoshitaka Nonaka, Junichi Watanabe | 1998-10-20 |
| 5820961 | Laminated optical discs | Shinichi Hanzawa, Masaaki Motokawa | 1998-10-13 |
| 5759332 | Process of reproducing optical discs and optical discs produced by the same | Masahide Itoigawa, Mitsuhiko Sasano, Shinichi Hanzawa, Masaaki Motokawa, Yoshikazu Hirai | 1998-06-02 |
| 5006058 | Apparatus for injection molding information recording disks | Ken Ishiguro, Hiroaki Watanabe, Osamu Yagisawa | 1991-04-09 |