Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851292 | Plate-like barium ferrite particles suitable for use in magnetic recording and process for producing the same | Norimichi Nagai, Norio Sugita, Masao Kiyama, Toshio Takada, Katsunori Fujimoto +1 more | 1989-07-25 |
| 4806429 | Plate-like barium ferrite particles suitable for use in magnetic recording and process for producing the same | Norimichi Nagai, Norio Sugita, Masao Kiyama, Toshio Takada, Katsunori Fujimoto +1 more | 1989-02-21 |
| 4781981 | Plate-like magnetoplumbite ferrite particles for magnetic recording and process for producing the same | Tsutomu Katamoto, Norimichi Nagai, Yasutaka Ota, Katsunori Fujimoto, Masao Kiyama | 1988-11-01 |