Issued Patents All Time
Showing 1–25 of 93 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6376083 | Magnetic recording medium | Yuichiro Murayama, Masaki Satake, Hiroshi Hashimoto | 2002-04-23 |
| 6191184 | Radiation-setting composition containing (meth)acrylic copolymers containing acid groups | Nobuo Suzuki, Yoshihisa Masaki | 2001-02-20 |
| 5908691 | Magnetic recording medium having a lower layer containing a specified polyurethane binder | Yuichiro Murayama, Masaki Satake, Hiroshi Hashimoto | 1999-06-01 |
| 5747157 | Magnetic recording medium | Hiroshi Hashimoto, Yuichiro Murayama, Masaki Satake | 1998-05-05 |
| 5702821 | Magnetic recording medium comprising ferromagnetic powder and a specified polyurethane resin | Yuichiro Murayama, Masaki Satake, Hiroshi Hashimoto | 1997-12-30 |
| 5700541 | Magnetic recording medium | Toshio Ishida | 1997-12-23 |
| 5612134 | Magnetic recording medium having a carbon protective layer and a fluoro-lubricant supplied from a backcoat layer | Hideomi Watanabe, Toshio Ishida, Masaki Satake, Hiroshi Hashimoto | 1997-03-18 |
| 5607782 | Magnetic recording medium | Toshio Ishida, Masaki Satake | 1997-03-04 |
| 5578376 | Magnetic recording medium having a magnetic layer comprising a specified ferromagnetic metal powder and a specified polyurethane binder | Hiroshi Hashimoto, Masatoshi Takahashi, Yuuichirou Murayama | 1996-11-26 |
| 5567524 | Magnetic recording medium having a cobalt thin film magnetic layer, carbon protective layer, and fluorolubricant layer | Toshio Ishida, Masaki Satake, Hideomi Watanabe, Tadashi Yasunaga | 1996-10-22 |
| 5560983 | Magnetic recording medium comprising a magnetic layer and a sub layer containing an unsaturated alkyl carbonic ester | Toshio Ishida, Yasushi Endo | 1996-10-01 |
| 5525418 | Magnetic recording medium having a magnetic layer containing ferromagnetic powder and a polyurethane resin obtained from a polyolefin polyol or a polybutadiene polyol | Hiroshi Hashimoto, Yuichiro Murayama, Masaki Satake | 1996-06-11 |
| 5496645 | Magnetic recording medium comprising a magnetic metallic thin film and a layer containing a specified fluorine compound and a specified tetrazaindene cyclic compound or thiouracil cyclic compound | Toshio Ishida, Masaki Satake | 1996-03-05 |
| 5492764 | Magnetic recording medium having a protective layer containing a tetrazaindene or thiouracil cyclic compound and a fluorine compound | Toshio Ishida, Masaki Satake, Tadashi Yasunaga, Kazuyuki Usuki | 1996-02-20 |
| 5484661 | Magnetic recording medium having a polyvinyl alkyl binder resin | Hiroshi Hashimoto, Masaki Satake, Yuichiro Murayama | 1996-01-16 |
| 5458979 | Magnetic recording medium having a magnetic layer comprising ferromagnetic particles, polyurethane resin and polyvinylacetal resin | Hiroshi Hashimoto, Masaki Satake, Yuuichirou Murayama | 1995-10-17 |
| 5395696 | Magnetic recording medium having a lubricant layer of a fluoroalkyl sulfo-compound | Toshio Ishida, Hideomi Watanabe, Kunihiko Honda, Kazuyuki Usuki | 1995-03-07 |
| 5258231 | Magnetic recording medium having ferromagnetic powder, a binder containing a specified vinyl chloride copolymer, polar group containing polyurethane resin and a fatty acid amide | Yasuo Nishikawa, Hiroshi Hashimoto, Hideomi Watanabe | 1993-11-02 |
| 5153063 | Magnetic recording medium having a vinyl-chloride resin and a urethane resin binder system each of which resins contain three percent or less of a low molecular weight resin fraction | Kazuko Hanai, Akihiro Matsufuji, Nobuo Aoki | 1992-10-06 |
| 5153071 | Magnetic recording medium wherein the magnetic layer has as the binder system a vinyl chloride copolymer and a polyether polyurethane resin which contains a ring structure | Hideomi Watanabe, Hiroshi Hashimoto | 1992-10-06 |
| 5141808 | Magnetic recording medium having two magnetic layers each containing a specified polyurethane resin | Hiroshi Hashimoto, Kazuo Hasumi | 1992-08-25 |
| 5126215 | Magnetic recording medium having a surface with pores of specified average inlet diameter and wide pore size distribution controlled by calender treatment | Masashi Aonuma, Hiroaki Araki, Hiroshi Hashimoto, Yasuo Nishikawa | 1992-06-30 |
| 5098783 | Magnetic recording medium having a backcoat layer comprising non-magnetic particles dispersed in a vinyl copolymer containing a dialkylaminoalkyl group | Hideomi Watanabe | 1992-03-24 |
| 5091268 | Magnetic recording medium lubricated by a three component fatty acid ester-fatty acid amide composition | Yasuo Nishikawa, Akira Kasuga, Masashi Aonuma | 1992-02-25 |
| 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, Kiyomi Ejiri | 1992-01-28 |