Issued Patents All Time
Showing 26–50 of 70 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6622132 | Device for encoding encrypted information on an optical disk | Mitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2003-09-16 |
| 6611820 | Recording medium, recorder, reproducer, cryptocommunication system and program license system | Mitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2003-08-26 |
| 6584046 | Method for reproducing information data from magneto-optical recording medium using linear polarized beam | Mitsuaki Oshima, Shinichi Konishi, Shin-ichi Tanaka, Kenji Koishi, Yoshiho Gotoh +3 more | 2003-06-24 |
| 6493304 | Optical disk apparatus | Katsuya Watanabe, Takeharu Yamamoto, Takashi Kishimoto | 2002-12-10 |
| 6489002 | Optical recording medium having dual information surfaces | Shin-ichi Tanaka, Yasuhiro Sugihara, Hiroshi Taniguchi, Michiyoshi Nagashima | 2002-12-03 |
| 6434094 | Optical disk apparatus | Shin-ichi Yamada, Yasuaki Edahiro, Kouichi Takamine, Katsuya Watanabe | 2002-08-13 |
| 6408285 | Optical disk reading device using both a decipher key and disk identification information for decryption | Mitsuaki Oshima, Yoshino Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2002-06-18 |
| 6396779 | Optical disk apparatus having tracking control for positioning a light beam along a track on an optical disk | Kenji Fujiune, Yoshihiro Kanda, Yuuichi Kuze | 2002-05-28 |
| 6381588 | Optical disk recordable using both a cipher key and disk identification information for encryption | Mitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2002-04-30 |
| 6343282 | Optical disk reading device using both a decipher key and disk identification information | Mitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2002-01-29 |
| 6339566 | Optical recording/reproduction device | Takashi Kishimoto, Katsuya Watanabe, Takeharu Yamamoto, Kouichi Ikeuchi, Kazushi Andoh | 2002-01-15 |
| 6317395 | Optical disc device for varying PLL characteristic and servo characteristic based on actual reproduction speed | Takeharu Yamamoto, Katsuya Watanabe, Takashi Kishimoto | 2001-11-13 |
| 6304536 | Optical disk apparatus | Shin-ichi Yamada, Yasuaki Edahiro, Kouichi Takamine, Katsuya Watanabe | 2001-10-16 |
| 6301569 | Optical disk, optical recorder, optical reproducer, cryptocommunication system and program license system | Mitsuaki Oshima, Yoshiro Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2001-10-09 |
| 6298019 | Optical disk apparatus | Katsuya Watanabe, Shin-ichi Yamada, Yasuaki Edahiro, Takeharu Yamamoto | 2001-10-02 |
| 6285635 | Optical disk apparatus | Katsuya Watanabe, Takeharu Yamamoto, Takashi Kishimoto | 2001-09-04 |
| 6280812 | Optical recording medium having dual information surfaces | Shin-ichi Tanaka, Yasuhiro Sugihara, Hiroshi Taniguchi, Michiyoshi Nagashima | 2001-08-28 |
| 6266299 | Magneto-optical disk having write-once identification marks and method for recording thereof | Mitsuaki Oshima, Shinichi Konishi, Shin-ichi Tanaka, Kenji Koishi, Yoshiho Gotoh +3 more | 2001-07-24 |
| 6195321 | Disk rotation control apparatus with deceleration means | Kouichi Takamine, Shin-ichi Yamada, Yasuaki Edahiro | 2001-02-27 |
| 6181651 | Optical recording/reproducing apparatus | Takashi Kishimoto, Katsuya Watanabe, Takeharu Yamamoto, Kouichi Ikeuchi, Kazushi Andoh | 2001-01-30 |
| 6147946 | Optical disk apparatus | Shin-ichi Yamada, Yasuaki Edahiro, Kouichi Takamine, Katsuya Watanabe | 2000-11-14 |
| 6143426 | Optical recording medium having dual information surfaces | Shin-ichi Tanaka, Yasuhiro Sugihara, Hiroshi Taniguchi, Michiyoshi Nagashima | 2000-11-07 |
| 6081785 | Optical disk, optical recorder, optical reproducer, crytocommunication system and program license system | Mitsuaki Oshima, Yoshiho Gotoh, Shinichi Tanaka, Kenji Koishi, Yoshinari Takemura | 2000-06-27 |
| 6078551 | Optical information recording or erasing system | Yoshiaki Komma, Shinichi Tanaka | 2000-06-20 |
| 6031813 | Optical recording medium having dual information surfaces | Shin-ichi Tanaka, Yasuhiro Sugihara, Hiroshi Taniguchi, Michiyoshi Nagashima | 2000-02-29 |