Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7172642 | Magnetic metal particles containing iron as main component, process for producing the same and magnetic recording medium using the same | Akinori Yamamoto, Haruki Kurokawa, Masaaki Maekawa | 2007-02-06 |
| 6753084 | Spindle-shaped magnetic alloy particles for magnetic recording, and magnetic recording medium | Masaaki Maekawa, Haruki Kurokawa, Kenji Okinaka, Akinori Yamamoto | 2004-06-22 |
| 6682813 | Magnetic acicular alloy particles containing iron as a main component | Kohji Mori | 2004-01-27 |
| 6447618 | Magnetic acicular alloy particles containing iron as a main component | Kohji Mori | 2002-09-10 |
| 5989516 | Spindle-shaped geothite particles | Kenji Okinaka | 1999-11-23 |
| 5968226 | Process of making goethite or iron-based alloy particles | Kenji Okinaka | 1999-10-19 |
| 5735969 | Method of producing acicular magnetic alloy particles | Jean A. Lown, Kenji Okinaka, Hirofumi Kawasaki | 1998-04-07 |
| 5645652 | Spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients and process for producing the same | Kenji Okinaka | 1997-07-08 |
| 5599378 | Spindle-shaped magnetic iron based alloy particles and process for producing the same | Akio Mishima, Tosiharu Harada, Mamoru Tanihara, Kenji Okinaka, Kohji Mori +4 more | 1997-02-04 |
| 5531922 | Granulated particles for magnetic particles for magnetic recording, and process for producing the same | Kenji Okinaka, Kohji Mori, Hirofumi Kawasaki, Masayuki Uegami, Akio Mishima +5 more | 1996-07-02 |
| 5466306 | Spindle-shaped magnetic iron based alloy particles | Akio Mishima, Tosiharu Harada, Mamoru Tanihara, Kenji Okinaka, Kohji Mori +4 more | 1995-11-14 |
| 5238483 | Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same | Akio Mishima, Mamoru Tanihara, Hirofumi Kawasaki, Kenji Okinaka, Kunio Ikemoto +3 more | 1993-08-24 |
| 5156922 | Acicular magnetic iron based alloy particles for magnetic recording and method of producing the same | Akio Mishima, Mamoru Tanihara, Hirofumi Kawasaki, Kenji Okinaka, Kunio Ikemoto +3 more | 1992-10-20 |
| 5137783 | Acicular magnetic metal particles containing iron as main ingredient and process for producing the same | Mamoru Tanihara, Hiroshi Fukui, Takashi Ogawa, Tsuneo Suhara | 1992-08-11 |
| 4851292 | Plate-like barium ferrite particles suitable for use in magnetic recording and process for producing the same | Norimichi Nagai, Akihiko Hirayama, Norio Sugita, Masao Kiyama, Toshio Takada +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, Akihiko Hirayama, Norio Sugita, Masao Kiyama, Toshio Takada +1 more | 1989-02-21 |
| 4781981 | Plate-like magnetoplumbite ferrite particles for magnetic recording and process for producing the same | Tsutomu Katamoto, Norimichi Nagai, Katsunori Fujimoto, Akihiko Hirayama, Masao Kiyama | 1988-11-01 |
| 4752407 | Process for producing plate-like barium ferrite particles | Norimichi Nagai, Katsunori Fujimoto, Masao Kiyama, Toshio Takada | 1988-06-21 |