Issued Patents All Time
Showing 26–40 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812351 | Magnetic recording medium | Tsutomu Okita, Hiroshi Hashimoto | 1989-03-14 |
| 4716077 | Magnetic recording medium | Tsutomu Okita, Hiroshi Hashimoto | 1987-12-29 |
| 4686149 | Magnetic recording medium and method of preparing | Hideomi Watanabe, Takahito Miyoshi, Tsutomu Okita | 1987-08-11 |
| 4671998 | Magnetic recording medium | Tsutomu Okita, Hiroshi Hashimoto | 1987-06-09 |
| 4663209 | Magnetic recording medium | Masaaki Suzuki, Satoshi Sakakibara, Noburo Hibino, Koh Kamada | 1987-05-05 |
| 4617234 | Magnetic recording medium | Yasuo Tamai | 1986-10-14 |
| 4604296 | Process for production of magnetic recording elements | Yasuo Tamai | 1986-08-05 |
| 4475946 | Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, Sb and Ag coated with mono- or dialkoxysilanes | Akihiro Matsufuji, Shizuo Umemura, Hajime Miyatsuka, Tatsuji Kitamoto | 1984-10-09 |
| 4437882 | Ferromagnetic powder treated with an organic silane compound | Shizuo Umemura, Akihiro Matsufuji, Tatsuji Kitamoto, Hajime Miyatsuka | 1984-03-20 |
| 4431712 | Magnetic recording medium of ferromagnetic particles and binder | Akihiro Matsufuji, Akira Kasuga, Hajime Miyatsuka | 1984-02-14 |
| 4309471 | Magnetic audio-recording tape | Masaaki Suzuki, Yasuo Tamai | 1982-01-05 |
| 4308311 | Magnetic recording material | Hiroshi Ogawa, Yasuo Tamai | 1981-12-29 |
| 4253886 | Corrosion resistant ferromagnetic metal powders and method of preparing the same | Yasuo Tamai | 1981-03-03 |
| 4246316 | Magnetic recording medium | Yasuo Tamai | 1981-01-20 |
| 4217152 | Process for production of ferromagnetic powder | Yasuo Tamai | 1980-08-12 |