Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6712514 | Hydrodynamic bearing unit | Yoshinobu Akamatsu, Kazuo Okamura | 2004-03-30 |
| 6672767 | Dynamic bearing device and motor having the same | Kimihiko Hajota, Hironori Itsusaki, Tsugito Nakazeki | 2004-01-06 |
| 6533460 | Hydrodynamic type porous oil-impregnated bearing | Kazuo Okamura, Yasuhiro Yamamoto, Isao Komori, Makoto Shiranami | 2003-03-18 |
| 6513980 | Hydrodynamic type porous oil-impregnated bearing | Kazuo Okamura, Yasuhiro Yamamoto, Isao Komori, Makoto Shiranami | 2003-02-04 |
| 6513979 | Hydrodynamic oil-impregnated sintered bearing unit | Tetsuya Kurimura | 2003-02-04 |
| 6357920 | Sintered oil retaining bearing and spindle motor for information equipment | Kazuo Okamura, Makoto Shiranami | 2002-03-19 |
| 6299356 | Hydrodynamic type porous oil-impregnated bearing | Kazuo Okamura, Yasuhiro Yamamoto, Isao Komori, Makoto Shiranami | 2001-10-09 |
| 6250807 | Hydrodynamic type bearing and hydrodynamic type bearing unit | Kazuo Okamura | 2001-06-26 |
| 6023114 | Spindle motor and rotating shaft supporting device for spindle motor | Kazuo Okamura, Yasuhiro Yamamoto | 2000-02-08 |
| 5941646 | Hydrodynamic type porous oil-impregnated bearing and bearing device | Yasuhiro Yamamoto, Isao Komori, Kazuo Okamura | 1999-08-24 |
| 5762423 | Bearing device, solid resin lubricating composition and porous oil-impregnated bearing | Yasuyuki Watanabe, Yasuhiro Yamamoto | 1998-06-09 |
| 5704718 | Sintered oil-impregnated bearing and method for manufacturing same | Yoshinori Ito, Toshihiko Tanaka, Yasuhiro Yamamoto | 1998-01-06 |
| 5697709 | Dynamic pressure type bearing device | Takashi Minami, Yasuhiro Yamamoto, Kiyotaka Kusunoki, Masakazu Hirata | 1997-12-16 |