Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251509 | Magnetic tape | Toshiyuki Kitahara, Minoru Sueki | 2001-06-26 |
| 6129979 | Magnetic recording medium | Tatsuo Ishikawa | 2000-10-10 |
| 5958565 | Magnetic recording tape favorably employable for computer data storage | Yasushi Hattori, Akira Kasuga, Tatsuo Ishikawa, Satoru Hayakawa | 1999-09-28 |
| 5549955 | Magnetic recording disk | Satoru Hayakawa, Yasushi Endo | 1996-08-27 |
| 5508117 | Magnetic recording medium and production process thereof | Yasushi Endo | 1996-04-16 |
| 5455093 | Flexible magnetic disk and process for preparing the same | Masaya Kojima, Kazuhiro Niitsuma | 1995-10-03 |
| 5389418 | Flexible magnetic recording disk and method for preparing the same | Masataka Ota, Yasushi Endo, Satoru Hayakawa | 1995-02-14 |
| 5384175 | Magnetic recording disc comprising a non-magnetic underlayer and a magnetic layer comprising ferromagnetic particles and a binder | Masaya Kojima, Kazuhiro Niitsuma, Satoru Hayakawa, Yasushi Endo | 1995-01-24 |
| 5370917 | Magnetic recording disc comprising magnetic powder and a binder in a container which includes a nonwoven fabric liner comprising polypropylene and rayon fibers | Kazuhiro Niitsuma, Satoru Hayakawa | 1994-12-06 |
| 5358777 | Magnetic recording medium comprising an underlayer of non magnetic powder and binder resin and a magnetic layer with a specified Young's modulus | Masaya Kojima, Satoru Hayakawa | 1994-10-25 |
| 5300314 | Process for preparing a magnetic recording medium | Satoru Hayakawa, Kazuhiro Niitsuma | 1994-04-05 |
| 5178925 | Magnetic disc having a magnetic layer with a glass transition temperature of at least 75.degree. C. which contains magnetic metal powder of specified pH and surface area | Yasushi Endo, Mikihiko Kato, Yasuo Nagashima | 1993-01-12 |
| 5145738 | Magnetic recording medium | Mikihiko Kato, Yasushi Endo, Yasuo Nishikawa | 1992-09-08 |
| 5112679 | Magnetic disk | Jun Nakagawa, Kunihiko Sano | 1992-05-12 |
| 5085911 | Flexible magnetic disc with a two layer protective coating which top layer is a ultra violet radiation cured compound with specified elasticity modulus | Mikihiko Kato, Yasushi Endo | 1992-02-04 |
| 5057373 | Magnetic recording medium | Fumihiro Tokunaga, Jun Nakagawa, Tsutomu Okita | 1991-10-15 |
| 5049448 | Magnetic recording medium containing an ester lubricant branched from the number 2 carbon position of the acid residue | Takao Ohya, Yasuo Nishikawa, Jun Nakagawa, Fusao Yamanaka, Tsutomu Okita +2 more | 1991-09-17 |
| 5024885 | Magnetic recording medium | Yasushi Endo, Mikihiko Kato, Kouichi Masaki | 1991-06-18 |
| 5022519 | Flexible disk jacket | Masakazu Iwasa, Kazuhiko Morita | 1991-06-11 |
| 5011395 | Surface smoothing apparatus for magnetic recording medium | — | 1991-04-30 |
| 4992328 | Magnetic recording medium | Mikihiko Kato, Yasushi Endo | 1991-02-12 |
| 4970121 | Magnetic recording medium | Fumihiro Tokunaga, Jun Nakagawa, Tsutomu Okita, Kazuo Hasumi | 1990-11-13 |
| 4963433 | Magnetic recording medium | Hiroshi Ogawa, Yasuo Tamai | 1990-10-16 |
| 4952444 | Magnetic recording medium | Kazuhiko Morita | 1990-08-28 |
| 4654258 | Magnetic recording medium | Yasuo Nishikawa, Kazuhiko Morita | 1987-03-31 |