Issued Patents All Time
Showing 1–25 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5413868 | Perpendicular magnetic recording medium comprising a magnetic thin film of cobalt, palladium, chromium and oxygen | Satoshi Matsubaguchi | 1995-05-09 |
| 5311500 | Magneto-optical disk | Manabu Higuchi, Takashi Yamada, Masaaki Nomura | 1994-05-10 |
| 5109377 | Magneto-optical recording medium and method of producing the same | Ryoichi Yamamoto, Takashi Yamada, Satoshi Matsubaguchi | 1992-04-28 |
| 4994321 | Perpendicular magnetic recording medium and the method for preparing the same | Makoto Nagao, Kunihiko Sano, Fusao Yamanaka | 1991-02-19 |
| 4975339 | Magneto-optical recording medium with at least one protective layer containing platinum and/or palladium | Takashi Yamada, Masaaki Nomura, Ryoichi Yamamoto | 1990-12-04 |
| 4929320 | Method of making magneto-optical recording medium | Takashi Yamada, Masaaki Nomura, Ryoichi Yamamoto, Satoshi Matsubaguchi | 1990-05-29 |
| 4897320 | Magneto-optical recording medium | Masaaki Nomura, Takashi Yamada, Ryoichi Yamamoto | 1990-01-30 |
| 4869797 | Method for preparing a magnetic recording medium | Makoto Nagao, Kunihiko Sano, Fusao Yamanaka | 1989-09-26 |
| 4868070 | Vertical magnetization type recording medium and manufacturing method therefor | Makoto Nagao, Fusao Yamanaka | 1989-09-19 |
| 4867101 | Apparatus for producing magnetic recording medium | Fusao Yamanaka, Makoto Nagao | 1989-09-19 |
| 4865878 | Method of manufacturing vertical magnetization type recording medium | Makoto Nagao, Fusao Yamanaka | 1989-09-12 |
| 4840843 | Magnetic recording medium | Kunihiko Sano, Makoto Nagao, Yasuo Nishikawa, Hiroyuki Iwasaki | 1989-06-20 |
| 4837118 | Magneto-optical recording medium | Ryoichi Yamamoto, Masaaki Nomura, Takashi Yamada | 1989-06-06 |
| 4808456 | Magneto-optical recording medium and method of making the same | Takashi Yamada, Masaaki Nomura, Ryoichi Yamamoto | 1989-02-28 |
| 4802160 | Optical disk substrate | Takashi Yamada, Masaaki Nomura, Ryoichi Yamamoto | 1989-01-31 |
| 4789606 | Magneto-optical recording medium | Takashi Yamada, Masaaki Nomura, Ryoichi Yamamoto | 1988-12-06 |
| 4748592 | Recording and reproducing method by a change in composition on a solid surface | Makoto Nagao, Goro Akashi | 1988-05-31 |
| 4735698 | Method of making magneto-optical recording medium | Masaaki Nomura, Takashi Yamada, Ryoichi Yamamoto | 1988-04-05 |
| 4717592 | Vertical magnetization type recording medium and manufacturing method therefor | Makoto Nagao, Fusao Yamanaka, Kunihiko Sano | 1988-01-05 |
| 4652483 | Magnetic recording medium | Yoshihiro Arai, Kiyotaka Fukino | 1987-03-24 |
| 4639815 | Magnetic recording medium with chromiumiron protective layer | Yoshihiro Arai | 1987-01-27 |
| 4626315 | Process of forming ultrafine pattern | Tatsuji Kitamoto, Hiroshi Amari, Ryuji Shirahata, Yoshihiro Arai | 1986-12-02 |
| 4610903 | Magneto-optical disk memory | Masaaki Nomura, Tatsuji Kitamoto | 1986-09-09 |
| 4609962 | Magnetic recording medium having improved weather resistance | Yoshihiro Arai, Makoto Nagao, Kiyotaka Fukino | 1986-09-02 |
| 4565734 | Magnetic recording medium | Yoshihiro Arai, Kiyotaka Fukino | 1986-01-21 |