Issued Patents All Time
Showing 51–75 of 78 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672423 | Magnetic recording medium having an underlayer containing three different powders | Hiroo Inaba | 1997-09-30 |
| 5645917 | Magnetic recording medium | Hiroo Inaba, Shinji Saito, Satoru Hayakawa | 1997-07-08 |
| 5496607 | Magnetic recording medium | Hiroo Inaba, Jun-ichi Nakamikawa, Toshihiko Miura | 1996-03-05 |
| 5480716 | Magnetic recording medium comprising ferromagnetic particles and a compound with a pyrimidine or tetrazaindene structure | Koji Naoe | 1996-01-02 |
| 5456977 | Magnetic recording medium and process for producing same | Masashi Aonuma, Yoichi Hayata | 1995-10-10 |
| 5455112 | Magnetic recording medium | Hiroo Inaba | 1995-10-03 |
| 5447782 | Magnetic recording medium having a specified thickness relationship between a nonmagnetic underlayer and overcoated magnetic layers | Hiroo Inaba, Koji Naoe | 1995-09-05 |
| 5318838 | Magnetic recording medium comprising ferromagnetic particles, binder resins and phenyl phosphonic acid | Akihiro Matsufuji, Mikihiko Kato, Takao Ohya | 1994-06-07 |
| 5258223 | Magnetic recording medium | Hiroo Inaba | 1993-11-02 |
| 5250354 | Magnetic recording medium containing magnetic alloy powder and specified binder resins and having a kerr rotational angle of 5 minutes or more | — | 1993-10-05 |
| 5219670 | Magnetic recording medium | Mikio Ohno, Nobuyoshi Asada | 1993-06-15 |
| 5176955 | Magnetic recording medium comprising ferromagnetic powder having a pH of at least 7 dispersed in a vinyl chloride copolymer using an aromatic phoshoric, phosphonic or sulfonic acid dispersant | Hiroaki Araki, Hiroshi Hashimoto | 1993-01-05 |
| 5096774 | Magnetic recording medium containing ferromagnetic particles with specified crystallite sizes and wherein the ratio of chlorine to iron at the surface is within a specified range | Kunihiko Sano, Hiroaki Doushita, Hiroyuki Tahara | 1992-03-17 |
| 5093191 | Magnetic recording medium containing ferromagnetic particles with specified crystallite sizes and wherein the ratio of chlorine to iron at the surface is within a specified range | Kunihiko Sano, Hiroaki Doushita, Hiroyuki Tahara | 1992-03-03 |
| 5084341 | Magnetic recording medium comprising a polyurethane resin having a thio, thiocarboxy or dithiocarboxy group; a vinyl chloride resin containing a polar group and a hyroxy group; and a polyisocyanate compound | Hiroshi Hashimoto, Tsutomu Okita | 1992-01-28 |
| 5064687 | Method for making magnetic recording media | Akihiro Matsufuji, Mikio Ohno, Masatoshi Kiyama, Kunihiko Honda | 1991-11-12 |
| 5041336 | Magnetic recording medium using a binder resin containing a polar group, and a lubricant system comprising two types of fatty acid esters and one fatty acid | Takao Ohya, Yasuo Nishikawa, Akihiro Matsufuji, Akira Kasuga | 1991-08-20 |
| 4968557 | Magnetic recording medium | Yutaka Kakuishi, Hiroaki Araki | 1990-11-06 |
| 4959263 | Magnetic recording medium | Masashi Aonuma, Tsutomu Okita, Hiroshi Hashimoto, Hiroaki Araki, Kiyotaka Fukino | 1990-09-25 |
| 4917947 | Magnetic recording medium | Kideaki Kosha, Toshihiko Miura, Koyotaka Fukino, Kouichi Masaki | 1990-04-17 |
| 4885208 | Magnetic recording medium | Hiroaki Araki, Takao Ohya | 1989-12-05 |
| 4828903 | Magnetic recording disk | Shigeo Komine | 1989-05-09 |
| 4806417 | Magnetic recording medium | Shinji Saito, Hiroaki Araki, Hiroshi Ogawa, Chiaki Mizuno | 1989-02-21 |
| 4803131 | Magnetic recording medium | Shinji Saito, Hiroaki Araki, Hiroshi Ogawa, Chiaki Mizuno | 1989-02-07 |
| 4801505 | Magnetic recording medium | Hiroaki Araki, Akihiro Matsufuji, Akira Kasuga | 1989-01-31 |