Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6339564 | Optical information recording/reproducing apparatus | Koichi Tezuka, Satoshi Itami, Tohru Fujimaki, Kazushi Uno | 2002-01-15 |
| 6185166 | Optical information recording/reproducing apparatus | Koichi Tezuka, Satoshi Itami, Tohru Fujimaki, Kazushi Uno | 2001-02-06 |
| 5859819 | Tracking and focus control system for optical disk apparatus | Koichi Tezuka, Shingo Hamaguchi | 1999-01-12 |
| 5796712 | Optical disk having identification signal recorded between and used in common for two mutually adjacent tracks and optical disk unit therefor | Mineo Moribe, Miyozo Maeda, Susumu Satoh | 1998-08-18 |
| 5793725 | Optical information recording/reproducing apparatus having a composite prism with a plurality of emission surfaces | Koichi Tezuka, Satoshi Itami, Tohru Fujimaki | 1998-08-11 |
| 5742572 | Optical information recording/reproducing apparatus which detects focal error | Koichi Tezuka | 1998-04-21 |
| 5623462 | Optical information recording/reproducing apparatus | Koichi Tezuka, Satoshi Itami, Tohru Fujimaki | 1997-04-22 |
| 5619482 | Optical head unit for an optical disk using a diffraction grating | Koichi Tezuka, Shingo Hamaguchi | 1997-04-08 |
| 5610895 | Optical head having light blocking means positioned in front of a detector for super-resolution detection | Haruhiko Izumi | 1997-03-11 |
| 5600618 | Optical data recording/reproducing device and integrated head | Koichi Tezuka | 1997-02-04 |
| 5402411 | Constant amplitude of tracking error signals generated from a head guide track and a performed track | Miyozo Maeda, Mineo Moribe, Susumu Satoh | 1995-03-28 |