Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5039554 | Process for preparing a backing layer of a magnetic recording medium which includes the predispersing of a fine .alpha.-Al.sub.2 O.sub.3 powder in a solvent containing a small amount of binder | Tadashi Ishikuro, Masaaki Fujiyama | 1991-08-13 |
| 4965125 | Magnetic recording medium and the method for preparing the same | Kouichi Masaki, Toshihiko Miura, Yasuo Tamai | 1990-10-23 |
| 4922675 | Abrasive tape | Masami Sato, Masaaki Fujiyama, Takashi Iwasaki, Masami Suzuki, Takashi Yoneyama | 1990-05-08 |
| 4886703 | Magnetic recording medium | Kazuo Hasumi, Hideomi Watanabe, Tsutomu Okita, Katsumi Ryoke | 1989-12-12 |
| 4803121 | Magnetic recording medium | Katsumi Ryoke, Masatoshi Takahashi, Toshimitu Okutu | 1989-02-07 |
| 4759979 | Magnetic recording medium | Kiyomi Ejiri | 1988-07-26 |
| 4740418 | Magnetic recording medium | Takahito Miyoshi | 1988-04-26 |
| 4734325 | Magnetic recording medium | Katsumi Ryoke, Nobutaka Yamaguchi, Masatoshi Takahashi, Kazuko Hanai, Eiichi Tadokoro | 1988-03-29 |
| 4729922 | Magnetic recording medium | Kiyomi Ejiri, Akihiro Matsufuji | 1988-03-08 |
| 4728569 | Magnetic recording medium | Katsumi Ryoke, Nobutaka Yamaguchi, Masatoshi Takahashi, Kazuko Hanai, Eiichi Tadokoro | 1988-03-01 |
| 4696858 | Magnetic recording medium | Katsumi Ryoke, Nobutaka Yamaguchi, Masatoshi Takahashi, Kazuko Hanai, Eiichi Tadokoro | 1987-09-29 |
| 4686139 | Magnetic recording medium | Katsumi Ryoke, Nobutaka Yamaguchi, Masatoshi Takahashi, Kazuko Hanai, Eiichi Tadokoro | 1987-08-11 |
| 4649072 | Magnetic recording medium | Katsumi Ryoke, Nobutaka Yamaguchi, Masatoshi Takahashi, Kazuko Hanai, Eiichi Tadokoro | 1987-03-10 |
| 4581251 | Process for producing cobalt-modified ferromagnetic iron oxide | Shin-ichiro Dezawa, Tatsuji Kitamoto | 1986-04-08 |