Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7636278 | Information recording system and an information recording method | Tomoaki Okumura, Tsuyoshi Hiraki, Kiyotaka Tanaka, Kazumasa Tarutani | 2009-12-22 |
| 6947769 | Radio base station device and radio communication method | Fujio Itomitsu | 2005-09-20 |
| 6396799 | Optical disk drive device using an optical disk having a continuous information track formed of alternating land/groove revolutions | Masato Nagasawa, Kazuhiko Nakane, Tsuyoshi Katayama | 2002-05-28 |
| 6275466 | Optical disk and optical disk drive device | Masato Nagasawa, Kazuhiko Nakane, Tsuyoshi Katayama | 2001-08-14 |
| 6236637 | Optical disk and optical disk drive device | Masato Nagasawa, Kazuhiko Nakane, Tsuyoshi Katayama | 2001-05-22 |
| 6147961 | Optical disk and optical disk drive device | Masato Nagasawa, Kazuhiko Nakane, Tsuyoshi Katayama | 2000-11-14 |
| 6069869 | Optical disk and optical disk drive device | Masato Nagasawa, Kazuhiko Nakane, Tsuyoshi Katayama | 2000-05-30 |
| 5986984 | Optical information processing device having switchable optics for use with plural media types | Keiji Nakamura, Masahisa Shinoda, Takeshi Utakouji, Norihiro Watanabe, Nobuo Takeshita +4 more | 1999-11-16 |
| 5946285 | Optical disk having a continuous information track formed of alternating land and groove track revolutions and a method of tracking the optical disk | Kazuhiko Nakane, Masato Nagasawa, Hiroyuki Ohata, Masayoshi Shimamoto, Kenji Gotoh +1 more | 1999-08-31 |
| 5892740 | Optical disk drive and optical disk having address pits for sectors in land and groove tracks | Masato Nagasawa, Tsuyoshi Katayama | 1999-04-06 |
| 5867474 | Optical disk having a continuous information track formed of alterating land/groove revolutions and optical disk drive | Masato Nagasawa, Kazuhiko Nakane, Tsuyoshi Katayama | 1999-02-02 |
| 5859820 | Optical disk drive and optical disk having a continuous information track formed of alternating land and groove revolutions | Masato Nagasawa, Yoshinobu Ishida, Tsuyoshi Katayama | 1999-01-12 |
| 5754506 | Optical disk drive and optical disk having address pits for sectors in land and groove tracks | Masato Nagasawa, Tsuyoshi Katayama | 1998-05-19 |