Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6616747 | Process for producing granular hematite particles | — | 2003-09-09 |
| 6139618 | Fine yellow composite iron oxide hydroxide pigment, and paint or resin composition using the same | Kazuyuki Hayashi, Mineko Ohsugi, Hiroko Morii | 2000-10-31 |
| 6117540 | Non-magnetic black particles, non-magnetic black pigment therefrom and non-magnetic black filler therefrom | Yasuyuki Tanaka, Hiroko Morii, Kazuyuki Hayashi | 2000-09-12 |
| 6087004 | Non-magnetic black particles, non-magnetic black pigment therefrom and non-magnetic black filler therefrom | Yasuyuki Tanaka, Hiroko Morii, Kazuyuki Hayashi | 2000-07-11 |
| 6027559 | Yellow iron oxide hydroxide particles and process for producing the same | Hiroko Morii, Mineko Ohsugi, Kazuyuki Hayashi | 2000-02-22 |
| 5449565 | Magnetic iron oxide particles, a process for producing the same and a magnetic recording medium | Koso Aoki, Nanao Horiishi | 1995-09-12 |
| 4873010 | Spindle-like magnetic iron oxide particles and process for producing the same | Atsushi Takedoi, Hiroyuki Kondo, Masaru Isoai, Yoshitaka Yoshinaga, Tosiharu Harada +3 more | 1989-10-10 |
| 4773931 | Spindle ferromagnetic alloy particles | Akio Mishima, Yosiro Okuda, Yoshitaka Yoshinaga, Akira Mukaizaka, Tokihiro Kurata | 1988-09-27 |