Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5318838 | Magnetic recording medium comprising ferromagnetic particles, binder resins and phenyl phosphonic acid | Akihiro Matsufuji, Kiyomi Ejiri, Mikihiko Kato | 1994-06-07 |
| 5104751 | Magnetic recording medium lubricant comprising a phthalic acid diester and fatty acid ester | Satoru Hayakawa | 1992-04-14 |
| 5091270 | Magnetic recording medium lubricated by a mixture of methyl branched iso ester compounds synthesized by the oko process | Yasuo Nishikawa, Satoru Hayakawa | 1992-02-25 |
| 5061564 | Magnetic recording medium comprising a polar group containing resin or compound and a methyl iso ester lubricant prepared from a methyl iso acid or methyl iso alcohol or both | Jun Nakagawa, Satoru Hayakawa, Yasuo Nishikawa, Tsutomu Okita, Hiroshi Hashimoto | 1991-10-29 |
| 5049448 | Magnetic recording medium containing an ester lubricant branched from the number 2 carbon position of the acid residue | Yasuo Nishikawa, Jun Nakagawa, Fusao Yamanaka, Toshio Kawamata, Tsutomu Okita +2 more | 1991-09-17 |
| 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 | Yasuo Nishikawa, Akihiro Matsufuji, Akira Kasuga, Kiyomi Ejiri | 1991-08-20 |
| 5030521 | Magnetic recording medium using a fatty acid ester lubricant wherein the alcohol component is branched at the number one carbon position | Yasuo Nishikawa, Hajime Miyatsuka | 1991-07-09 |
| 4885208 | Magnetic recording medium | Hiroaki Araki, Kiyomi Ejiri | 1989-12-05 |