Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6961196 | Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier | Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto, Hiroshi Ryonai | 2005-11-01 |
| 6606208 | Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier | Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto | 2003-08-12 |
| 6606209 | Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier | Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Hiroshi Ryonai | 2003-08-12 |
| 6590727 | Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier | Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto | 2003-07-08 |
| 6587290 | Master information carrier, method for producing the carrier, and method apparatus for writing information into magnetic record medium using the carrier | Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto | 2003-07-01 |
| 6567227 | Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier | Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Kazunari Yoshimoto, Hiroshi Ryonai | 2003-05-20 |
| 6529341 | Magnetic recording/reproduction device using preformat information | Tatsuaki Ishida, Taizou Hamada, Kiyokazu Tohma, Hiroshi Ryonai | 2003-03-04 |
| 6347016 | Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier | Tatsuaki Ishida, Ryuji Sugita, Kiyokazu Tohma, Hiroshi Ryonai | 2002-02-12 |
| 6242085 | Magnetic recording medium and method for producing the same | Hiroshi Ryonai, Tatsuaki Ishida, Kiyokazu Tohma, Taizou Hamada | 2001-06-05 |
| 6069776 | Tubular rotary head cleaner having a non-woven fabric for a magnetic recording and/or reproducing apparatus | Kenji Hasegawa, Yoshiaki Mizoh, Norimoto Nouchi, Masaya Sakaguchi, Tetsuo Fuchi | 2000-05-30 |
| 5973892 | Head cleaner for magnetic recording/reproducing apparatus having a cleaning roller with abrading capability | Kenji Hasegawa, Yoshiaki Mizoh, Norimoto Nouchi, Masaya Sakaguchi, Tetsuo Fuchi | 1999-10-26 |