Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE38227 | Variable transfer rate control coding apparatus, reproducing apparatus and recording medium | Kenji Sugiyama, Ichiro Ando | 2003-08-19 |
| 6160782 | Holographic storage medium and reproduction of data therefrom | Kazunori Namiki, Kenji Narusawa | 2000-12-12 |
| 6083667 | Optical recording medium | Akira Nishizawa | 2000-07-04 |
| 5930217 | Optical information recording/reproducing system, optical information storage medium, and manufacturing method thereof | — | 1999-07-27 |
| 5809545 | Optical disc for a master key, and a method and apparatus for optical-disc information management which inhibit and permit reproduction of main information from an illegal copy disc by using physical and logical security information | Kazuhisa Ozaki | 1998-09-15 |
| 5790745 | Variable transfer rate control coding apparatus, reproducing apparatus and recording medium | Kenji Sugiyama, Ichiro Ando | 1998-08-04 |
| 5781526 | Optical recording medium having a disc with deformed pits | Akira Nishizawa | 1998-07-14 |
| 5696757 | Optical disc, device for checking optical disc and device for recording information on optical disc | Kazuhisa Ozaki, Hirofumi Nagano | 1997-12-09 |
| 5617408 | Optical recording medium having a disc with deformed pits | Akira Nishizawa | 1997-04-01 |
| 5572507 | Optical disc, device for checking optical disc, and device for recording information on optical disc | Kazuhisa Ozaki, Hirofumi Nagano | 1996-11-05 |
| 5006703 | Reflective optical rotary encoder disc | Juichi Shikunami, Makoto Itonaga, Masakatsu Kai, Nobuaki Nakamura | 1991-04-09 |
| 4695162 | Film thickness measuring apparatus | Makoto Itonaga | 1987-09-22 |
| 4653924 | Rotating analyzer type ellipsometer | Makoto Itonaga | 1987-03-31 |
| 4340907 | Special reproducing system in an apparatus for reproducing video signals from a rotary recording medium | Atsumi Hirata | 1982-07-20 |
| 4247741 | Reproducing transducer feeding device in a rotary recording medium reproducing apparatus | Kazuo Tatsuguchi, Atsumi Hirata, Tetsushi Akasaka | 1981-01-27 |