Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5123376 | Apparatus for manufacturing magnetic recording medium | Shiro Kaneko, Masao Takei | 1992-06-23 |
| 5122389 | Vacuum evaporation method and apparatus | — | 1992-06-16 |
| 5114778 | Magnetic recording medium | Akio Yanai | 1992-05-19 |
| 5112669 | Magnetic recording medium | Kenichi Yoden | 1992-05-12 |
| 5069932 | Method of winding up a magnetic recording medium | Junji Nakada, Hideaki Takeuchi | 1991-12-03 |
| 5069933 | Method for making magnetic recording media | Shiro Kaneko, Kunihiko Sano | 1991-12-03 |
| 4990361 | Method for producing magnetic recording medium | Akio Yanai, Koji Sasazawa | 1991-02-05 |
| 4988535 | Magnetic recording medium | Yoshihiro Arai, Ryuji Shirahata | 1991-01-29 |
| 4983421 | Method for producing magnetic recording media | Kouichi Mochizuki, Hiromi Nakahara | 1991-01-08 |
| 4956229 | Magnetic recording medium | Akio Yanai, Koji Sasazawa, Makoto Nagao | 1990-09-11 |
| 4948626 | Method for producing thin-film magnetic recording medium | Koji Sasazawa, Akio Yanai | 1990-08-14 |
| 4935605 | Apparatus for correcting curl of magnetic recording medium | Masaru Sekine | 1990-06-19 |
| 4923748 | Magnetic recording medium | Akio Yanai, Koji Sasazawa | 1990-05-08 |
| 4885189 | Method of producing magnetic recording media | Ryuji Shirahata | 1989-12-05 |
| 4876113 | Method for producing magnetic recording media | Koji Sasazawa | 1989-10-24 |
| 4873154 | Magnetic recording medium containing Fe, Co, N and O | Akio Yanai | 1989-10-10 |
| 4835068 | Magnetic recording medium | Yoshihiro Arai, Ryuji Shirahata | 1989-05-30 |
| 4801500 | Magnetic recording medium | Akio Yanai | 1989-01-31 |
| 4724156 | Method of manufacturing magnetic recording medium | Yoshihiro Arai, Ryuji Shirahata | 1988-02-09 |
| 4713262 | Manufacturing method for a magnetic recording medium | Ryuji Shirahata | 1987-12-15 |
| 4702938 | Process for producing magnetic recording material | Akio Yanai, Ryuji Shirahata | 1987-10-27 |
| 4673610 | Magnetic recording medium having iron nitride recording layer | Ryuji Shirahata, Yoshihiro Arai | 1987-06-16 |