Issued Patents All Time
Showing 1–25 of 32 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, Kazunari Yoshimoto, Keizou Miyata, Hiroshi Ryonai | 2005-11-01 |
| 6909565 | Magnetic transfer method and magnetic transfer apparatus | Hideyuki Hashi, Taizou Hamada, Tatsuaki Ishida | 2005-06-21 |
| 6898032 | Method and apparatus for magnetic printing | Hideyuki Hashi, Taizou Hamada, Tatsuaki Ishida | 2005-05-24 |
| 6858329 | Master disc and method for manufacturing magnetic disc using the same | Taizou Hamada, Hideyuki Hashi, Tatsuaki Ishida, Nobuyuki Komura, Yasuaki Ban +1 more | 2005-02-22 |
| 6858328 | Master information support | Tatsuaki Ishida, Keizo Miyata, Yoriko Takai, Taizou Hamada, Hiroshi Ryonai | 2005-02-22 |
| 6714367 | Master information medium and method of master information recording | Tatsuaki Ishida, Hiroshi Ryonai, Nobuyuki Komura, Keizo Miyata | 2004-03-30 |
| 6611388 | Master information magnetic recorder | Keizo Miyata, Tatsuaki Ishida, Taizou Hamada, Hiroshi Ryonai | 2003-08-26 |
| 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, Kazunari Yoshimoto, Keizou Miyata | 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, Keizou Miyata, 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, Kazunari Yoshimoto, Keizou Miyata | 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, Kazunari Yoshimoto, Keizou Miyata | 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, Kazunari Yoshimoto, Keizou Miyata, Hiroshi Ryonai | 2003-05-20 |
| 6529341 | Magnetic recording/reproduction device using preformat information | Tatsuaki Ishida, Taizou Hamada, Hiroshi Ryonai, Keizou Miyata | 2003-03-04 |
| 6466385 | Method and apparatus of forming a magnetic disk with a servo sector and a data sector on a spiral track | Yoshio Umeda, Ryosuke Shimizu, Syuichi Yoshida, Tatsuaki Ishida, Keizo Miyata | 2002-10-15 |
| 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, Keizou Miyata, Hiroshi Ryonai | 2002-02-12 |
| 6242085 | Magnetic recording medium and method for producing the same | Hiroshi Ryonai, Tatsuaki Ishida, Keizou Miyata, Taizou Hamada | 2001-06-05 |
| 5851660 | Method of fabricating a thin-film magnetic recording medium and thin-film magnetic recording medium | Kazunari Yoshimoto, Ryuji Sugita | 1998-12-22 |
| 5679410 | Continuous fabrication of thin film magnetic recording medium with vacuum deposition | Ryuji Sugita, Tatsuaki Ishida, Kazunari Yoshimoto | 1997-10-21 |
| 5665460 | Magnetic recording medium | Ryuji Sugita, Tatsuaki Ishida, Kazunari Yoshimoto | 1997-09-09 |
| 5554440 | Magnetic recording medium and method for producing the same | Tatsuaki Ishida, Ryuji Sugita, Yasuaki Ban | 1996-09-10 |
| 5549936 | Manufacturing method of magnetic recording medium | Kazunari Yoshimoto, Ryuji Sugita, Tatsuaki Ishida | 1996-08-27 |
| 5534324 | Magnetic recording medium and method for producing the same | Ryuji Sugita, Tatsuaki Ishida, Yasuaki Ban | 1996-07-09 |
| 5472506 | Method and apparatus for producing magnetic recording medium | Ryuji Sugita, Tatsuaki Ishida, Yasuaki Ban | 1995-12-05 |
| 5458914 | Method for producing magnetic recording medium | Ryuji Sugita, Tatsuaki Ishida, Yasuaki Ban | 1995-10-17 |
| 5433999 | Magnetic recording medium comprising specific backcoat layer | Yoshiki Goto, Yukihiro Shimasaki, Kazuyoshi Honda, Tatsuaki Ishida, Ryuji Sugita +1 more | 1995-07-18 |