Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4911997 | Magnetic recording medium | Masaaki Fujiyama | 1990-03-27 |
| 4740419 | Magnetic recording media | Masaaki Fujiyama, Haruo Masuda | 1988-04-26 |
| 4726992 | Magnetic recording medium | Masaaki Fujiyama, Takahito Miyoshi, Yasuyuki Yamada | 1988-02-23 |
| 4678706 | Magnetic recording medium | Fumihiro Tokunaga, Masaaki Fujiyama | 1987-07-07 |
| 4678682 | Process for producing magnetic recording medium | Goro Akashi, Tatsuji Kitamoto, Hiroshi Chikamasa, Tsunehiko Sato | 1987-07-07 |
| 4666770 | Magnetic recording medium | Masaaki Fujiyama | 1987-05-19 |
| 4657814 | Magnetic recording medium | Masaaki Fujiyama | 1987-04-14 |
| 4657813 | Magnetic recording medium | Masaaki Fujiyama | 1987-04-14 |
| 4656088 | Magnetic recording medium | Fumihiro Tokunaga, Masaaki Fujiyama | 1987-04-07 |
| 4629653 | Magnetic recording medium having laminated hexagonal ferrite platelets | Masaaki Fujiyama, Minoru Kanazawa, Nobuo Aoki | 1986-12-16 |
| 4552808 | Magnetic recording material using plate-shaped ferromagnetic particles | Masaaki Fujiyama, Toshihiko Miura | 1985-11-12 |
| 4547393 | Method for preparing a magnetic recording medium | Tatsuji Kitamoto, Goro Akashi | 1985-10-15 |