Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7652966 | Information recording method and apparatus, information reproducing method and apparatus, and recording medium | — | 2010-01-26 |
| 7382708 | Data recording/reproducing device | Akihiko Shimizu | 2008-06-03 |
| 7046610 | Recording medium suitable for recording/reproducing multi-level data | Koubun Sakagami | 2006-05-16 |
| 6888479 | Data processing method, circuit, and apparatus with increased accuracy | Koubun Sakagami, Kazunori Takatsu, Akihiko Shimizu | 2005-05-03 |
| 5438601 | Reference clock frequency divider | Hiroshi Maegawa, Toshihiro Shigemori | 1995-08-01 |
| 5414720 | Device and method using second error correction code for data in a recording medium | — | 1995-05-09 |
| 5099483 | Device for correcting errors by a long-distance code | — | 1992-03-24 |
| 4937829 | Error correcting system and device | — | 1990-06-26 |
| 4870685 | Voice signal coding method | Hiroki Uchiyama, Wasaku Yamada | 1989-09-26 |