Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6049519 | Optical system for recording and reproducing for use in optical information recording medium | Norikazu Arai, Hiroyuki Yamazaki, Hiroshi Kibayashi | 2000-04-11 |
| 5966362 | Optical system for recording and reproducing for use in optical information recording medium | Norikazu Arai, Hiroyuki Yamazaki, Hiroshi Kibayashi | 1999-10-12 |
| 5920532 | Information pick-up apparatus and optical disk apparatus | Katsuya Yagi, Hiroyuki Yamazaki | 1999-07-06 |
| 5818809 | Optical system for recording and/or reproducing an optical information recording medium | Norikazu Arai | 1998-10-06 |
| 5757758 | Optical pickup apparatus objective lens and converging optical system for optical pickup and optical disk apparatus | Katsuya Yagi, Hiroyuki Yamazaki | 1998-05-26 |
| 5754513 | Information pick-up apparatus and optical disk apparatus | Katsuya Yagi, Hiroyuki Yamazaki | 1998-05-19 |
| 5724335 | Objective lens for recording and reproducing for use in an optical information recording medium | — | 1998-03-03 |
| 5475537 | Optical system for use in recording and reading information on an optical information medium | Kaoru Kushida, Norikazu Arai | 1995-12-12 |