Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7099255 | Error counting apparatus for counting an error number of a pre-pit signal in an optical disc and method therefor | Masahiro Kato, Naoharu Yanagawa, Tatsuhiro Yone, Shinji Suzuki | 2006-08-29 |
| 6956802 | Aperture ratio measuring apparatus for optical recording medium with pre-pits | Masahiro Kato, Naoharu Yanagawa, Tatsuhiro Yone, Shinji Suzuki | 2005-10-18 |
| 6954418 | APPARATUS FOR ADJUSTING SIGNAL LEVELS DERIVED FROM AN OPTICAL DISC TO BECOME EQUAL TO A REFERENCE LEVEL DETERMINED FROM AT LEAST ONE OF THE SIGNAL LEVELS OF THE SIGNALS AND FOR SYNTHESIZING THE SIGNALS | Naoharu Yanagawa, Masahiro Kato, Tatsuhiro Yone, Shinji Suzuki | 2005-10-11 |
| 6928041 | Pre-pit detecting apparatus for optical recording medium | Masahiro Kato, Naoharu Yanagawa, Tatsuhiro Yone, Shinji Suzuki | 2005-08-09 |
| 6865143 | Optical device including a calibrating unit for calibrating a level adjusting unit | Naoharu Yanagawa, Masahiro Kato, Tatsuhiro Yone, Shinji Suzuki | 2005-03-08 |
| 6801488 | Pre-pit detecting apparatus for optical recording medium | Masahiro Kato, Naoharu Yanagawa, Tatsuhiro Yone, Shinji Suzuki | 2004-10-05 |