Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7976717 | Method of forming polarization reversal area, apparatus thereof and device using it | Xijun LI, Kazuya Terabe, Kenji Kitamura | 2011-07-12 |
| 6900914 | Optical information recording and reproducing apparatus having volume holographic memory | Satoru Tanaka, Tomomitsu Kouno, Yoshihisa Itoh, Hajime Matsushita, Takashi Yamaji | 2005-05-31 |
| 6862120 | Hologram recording medium, hologram recording method and hologram recording and reproducing apparatus | Satoru Tanaka, Hajime Matsushita, Yoshihisa Itoh, Tomomitsu Kouno | 2005-03-01 |
| 6856433 | Holographic recording medium and holographic recording/reproducing apparatus using the same | Takashi Yamaji, Kenji Kitamura, Shunji Takekawa, Masaru Nakamura | 2005-02-15 |
| 6816291 | Optical information recording and reproducing apparatus having volume holographic memory | Satoru Tanaka, Tomomitsu Kouno, Yoshihisa Itoh, Hajime Matsushita, Takashi Yamaji | 2004-11-09 |
| 6670079 | Photorefractive material | Kenji Kitamura, Yasunori Furukawa, Shunji Takekawa, Myeongkyu Lee, Satoru Tanaka +1 more | 2003-12-30 |
| 6594220 | Volume holographic memory and optical information recording/reproducing apparatus | Hajime Matsushita, Tomomitsu Kouno, Yoshihisa Itoh, Satoru Tanaka, Takashi Yamaji +1 more | 2003-07-15 |
| 6574181 | Holographic memory medium and recording apparatus using the same | Satoru Tanaka, Tomomitsu Kouno, Yoshihisa Itoh, Hajime Matsushita, Takashi Yamaji | 2003-06-03 |
| 6535472 | Hologram recording apparatus and method therefor | Myeongkyu Lee, Kenji Kitamura, Yasunori Furukawa, Shunji Takekawa | 2003-03-18 |
| 6490061 | Optical information recording and reproducing apparatus having volume holographic memory | Satoru Tanaka, Tomomitsu Kouno, Yoshihisa Itoh, Hajime Matsushita, Takashi Yamaji | 2002-12-03 |
| 6473208 | Two-color holographic recording apparatus | Myeongkyu Lee, Kenji Kitamura, Yasunori Furukawa, Shunji Takekawa, Yoshihisa Ito +1 more | 2002-10-29 |
| 6414762 | Optical information recording and reproducing apparatus using a holographic memory | Takashi Yamaji, Tomomitsu Kouno, Yoshihisa Itoh, Satoru Tanaka, Hajime Matsushita | 2002-07-02 |
| 6373806 | Two-color hologram recording/reproducing apparatus | Kenji Kitamura, Yasunori Furukawa, Shunji Takekawa, Myeongkyu Lee, Satoru Tanaka +1 more | 2002-04-16 |
| 6320683 | Optical information recording and reproducing apparatus using a volume holographic memory | Yoshihisa Ito, Tomomitsu Kouno, Takashi Yamaji, Satoru Tanaka, Hajime Matsushita | 2001-11-20 |
| 6301028 | Holographic memory and optical information recording and reproducing apparatus using the same | Satoru Tanaka, Tomomitsu Kouno, Yoshihisa Itoh, Hajime Matsushia, Takashi Yamaji | 2001-10-09 |
| 6256281 | Volume holographic memory-based optical information-recording/reproducing apparatus | Satoru Tanaka, Takashi Yamaji | 2001-07-03 |
| 6088321 | Volume holographic memory apparatus having a reference beam and a signal beam with opposite intensity distributions | Takashi Yamaji, Satoru Tanaka | 2000-07-11 |
| 6049401 | Volume holographic memory | Satoru Tanaka, Takashi Yamaji | 2000-04-11 |
| 5144463 | Liquid crystal light valve using non-monochromatic writing light | Akira Yokoi, Masayuki Iwasaki, Takashi Yamaji | 1992-09-01 |
| 5009490 | Photo-conductive liquid crystal light valve | Tomomitsu Kouno, Takashi Yamaji, Sakashi Ootaki, Masami Nishida | 1991-04-23 |
| 4670865 | Method of recording information on magneto-optic information storage medium | — | 1987-06-02 |
| 4554651 | Magneto-optical recording medium and method for preventing the erasing of the information recorded on the magneto-optical recording medium | Mikio Kanai, Norikiyo Tajiri, Sakashi Otaki, Sigeru Kato | 1985-11-19 |
| 4550346 | Magneto-optic information recording system | — | 1985-10-29 |
| 4549287 | System for recording and playing back information with magneto-optical disk memory using record and readout light beams of different wavelengths | Norikiyo Tajiri, Sakashi Otaki, Shigeru Kato | 1985-10-22 |
| 4539662 | Method and system for optically recording and playing back information on a recording medium having magnetization film thereon | Norikiyo Tajiri, Sakashi Otaki, Shigeru Kato | 1985-09-03 |