Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6476112 | Calcium-iron oxide composite particles | Toshiki Matsui, Yasuhiko Fujii, Satoshi Hatakeyama, Tomoko Okita, Tomoyuki Imai | 2002-11-05 |
| 6228924 | Calcium-iron oxide composite particles and resin molded product containing the same | Toshiki Matsui, Yasuhiko Fujii, Satoshi Hatakeyama, Tomoko Okita, Tomoyuki Imai | 2001-05-08 |
| 5993536 | Method of decoloring colored concrete | Toshiki Matsui, Yasuhiko Fujii, Tomoyuki Imai | 1999-11-30 |
| 5587232 | Non-magnetic particles for non-magnetic undercoating layer of magnetic recording medium, non-magnetic undercoating layer containing the same, and magnetic recording medium having the undercoating layer | Kazuyuki Hayashi, Keisuke Iwasaki, Yasuyuki Tanaka, Minoru Ohsugi, Toshiharu Harada +1 more | 1996-12-24 |
| 5582914 | Magnetic iron oxide particles and method of producing the same | Atsushi Takedoi, Mamoru Tanihara, Tosiharu Harada, Kazuhiro Fujita | 1996-12-10 |
| 5480571 | Process for producing acicular goethite particles and acicular magnetic iron oxide particles | Tosiharu Harada, Tokihiro Kurata, Kazuhiro Fujita, Kazushi Takama, Shigekazu Jikuhara | 1996-01-02 |
| 5378380 | Process for producing acicular geothite particles and acicular magnetic iron oxide particles | Tosiharu Harada, Tokihiro Kurata, Kazuhiro Fujita, Kazushi Takama, Shigekazu Jikuhara | 1995-01-03 |
| 5314750 | Magnetic iron oxide particles and method of producing same | Atsushi Takedoi, Mamoru Tanihara, Tosiharu Harada, Kazuhiro Fujita | 1994-05-24 |
| 4873010 | Spindle-like magnetic iron oxide particles and process for producing the same | Atsushi Takedoi, Hiroyuki Kondo, Yoshitaka Yoshinaga, Tosiharu Harada, Yosiro Okuda +3 more | 1989-10-10 |