Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5578376 | Magnetic recording medium having a magnetic layer comprising a specified ferromagnetic metal powder and a specified polyurethane binder | Hiroshi Hashimoto, Masatoshi Takahashi, Tsutomu Okita | 1996-11-26 |
| 5458979 | Magnetic recording medium having a magnetic layer comprising ferromagnetic particles, polyurethane resin and polyvinylacetal resin | Hiroshi Hashimoto, Masaki Satake, Tsutomu Okita | 1995-10-17 |
| 5073439 | Magnetic recording medium comprising a vinyl chloride based resin group containing an epoxy group or a polar or both and further a polyurethane resin containing three hydroxyl groups and one polar group | Hiroshi Hashimoto, Akira Ushimaru | 1991-12-17 |