Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833020 | Magnetic recording medium | Yoshihiro Shiroishi, Sadao Hishiyama, Hiroyuki Suzuki, Tomoyuki Ohno, Yoshibumi Matsuda +4 more | 1989-05-23 |
| 4786553 | Magnetic recording medium | Yoshihiro Shiroishi, Sadao Hishiyama, Hiroyuki Suzuki, Norikazu Tsumita, Tsuneo Suganuma +3 more | 1988-11-22 |
| 4735853 | Magnetic recording medium having an amorphous, nonmagnetic nickel-tungston-phosphorus underlayer | Hiroaki Okudaira, Hitoshi Oka, Masako Fujisawa, Nobuo Nakagawa | 1988-04-05 |