Issued Patents All Time
Showing 26–50 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6285763 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2001-09-04 |
| 6285762 | Optical disk, optical disk barcode forming method, optical disk reproduction apparatus, marking forming apparatus, method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2001-09-04 |
| 6285764 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2001-09-04 |
| 6278671 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2001-08-21 |
| 6229896 | Optical disk, an optical barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2001-05-08 |
| 6208736 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2001-03-27 |
| 6175629 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2001-01-16 |
| 6160888 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2000-12-12 |
| 6144742 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2000-11-07 |
| 6141419 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2000-10-31 |
| 6128388 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2000-10-03 |
| 6125181 | Optical disk, an optical disk barcode forming method, an optical reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2000-09-26 |
| 6122373 | Optical disk, optical disk barcode forming method, optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2000-09-19 |
| 6052465 | Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | Yoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi | 2000-04-18 |
| 6044049 | Optical information apparatus employing two different tracking error signals based on regions on information medium | Kenji Fujiune, Hiroyuki Yamaguchi, Shin-ichi Yamada, Katsuya Watanabe | 2000-03-28 |
| 6028826 | Optical disk apparatus performing correction of phase difference tracking error signal, adjustment of focus position and process of gain adjustment | Takeharu Yamamoto, Katsuya Watanabe, Takashi Kishimoto | 2000-02-22 |
| 5878007 | Anti-wobble optical medium and tracking method and apparatus | Yasuki Matsumoto, Hiroyuki Yamaguchi, Shin-ichi Yamada | 1999-03-02 |
| 5732051 | Focusing control apparatus using dynamic target value in relation to land/groove | Hiroyuki Yamaguchi, Osamu Yamaguchi, Shin-ichi Yamada, Toshiyuki Kinou, Yoshihiro Kanda | 1998-03-24 |
| 5671200 | Method for detecting the movement of a light beam and optical information reproduction apparatus using the same | Osamu Yamaguchi, Hiroyuki Yamaguchi, Yoshihiro Kanda, Hiromichi Ishibashi | 1997-09-23 |
| 5491676 | Tracking control apparatus and track jump detection apparatus | Hiroyuki Yamaguchi, Shinichi Yamada | 1996-02-13 |
| 5461602 | Optical recording and reproducing method and apparatus using light beams of two different wavelenghts | Hiromichi Ishibashi | 1995-10-24 |
| 5343454 | Tracking control apparatus for correcting tracking error signal according to approximate equation of a function of track address | Katsuya Watanabe, Masayuki Shibano, Hiroyuki Yamaguchi, Yasuaki Edahiro | 1994-08-30 |
| 5331615 | Tracking control apparatus for an optical disk device | Shinichi Yamada, Masayuki Shibano, Hiroyuki Yamaguchi | 1994-07-19 |
| 5319623 | Data-track search apparatus for locating a desired data track on a record carrier | Shinichi Yamada, Hiroyuki Yamaguchi | 1994-06-07 |
| 5295131 | Optical information recording disk having embossed clock mark pits and embossed information recording pits | Hiromichi Ishibashi | 1994-03-15 |