Issued Patents All Time
Showing 1–12 of 12 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, Keizou Miyata, 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, Keizou Miyata | 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, 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, Kiyokazu Tohma, 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, Kiyokazu Tohma, Keizou Miyata, Hiroshi Ryonai | 2003-05-20 |
| 5851660 | Method of fabricating a thin-film magnetic recording medium and thin-film magnetic recording medium | Kiyokazu Tohma, Ryuji Sugita | 1998-12-22 |
| 5691008 | Magnetic recording media fabrication method | Kiyokazu Thoma, Ryuji Sugita, Tatsuaki Ishida | 1997-11-25 |
| 5679166 | Magnetic recording media, magnetic recording media fabrication method, and fabrication equipment | Kiyokazu Thoma, Ryuji Sugita, Tatsuaki Ishida | 1997-10-21 |
| 5679410 | Continuous fabrication of thin film magnetic recording medium with vacuum deposition | Ryuji Sugita, Kiyokazu Tohma, Tatsuaki Ishida | 1997-10-21 |
| 5665460 | Magnetic recording medium | Ryuji Sugita, Kiyokazu Tohma, Tatsuaki Ishida | 1997-09-09 |
| 5569523 | Magnetic recording medium having a ferromagnetic thin film in which 70% to 90% of the total magnetic particles have residual magnetization vectors within .+-.10.degree. of the easy axis direction | Kiyokazu Thoma, Ryuji Sugita, Tatsuaki Ishida | 1996-10-29 |
| 5549936 | Manufacturing method of magnetic recording medium | Kiyokazu Tohma, Ryuji Sugita, Tatsuaki Ishida | 1996-08-27 |