Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6605573 | Lubricating oil composition for internal combustion engines (LAW651) | Katsuya Koganei | 2003-08-12 |
| 6586376 | Heat resistant lubricating oil composition | Hiroshi Nakanishi, Ko Onodera, Atsuhisa Kobori, Yoshinobu Nakamura | 2003-07-01 |
| 6191080 | Heat resistant lubricating oil composition | Hiroshi Nakanishi, Ko Onodera, Atsuhisa Kobori, Yoshinobu Nakamura | 2001-02-20 |
| 5925288 | Electrorheological fluid containing silica particles esterified by an alcohol-modified silicone oil | Nobuharu Umamori, Mikirou Arai, Masahiko Hayafune | 1999-07-20 |
| 5603861 | Electroviscous fluid mixed with esterified silica fine particles and polyhydric alcohol | Nobuharu Umamori, Tetsuo Miyamoto, Hirotaka Tomizawa | 1997-02-18 |
| 5387370 | Electroviscous fluid | Hirotaka Tomizawa, Tetsuo Miyamoto | 1995-02-07 |
| 5288535 | Electrode for electroviscous fluid | Masahiko Hayafune, Hirotaka Tomizawa, Katsuya Arai | 1994-02-22 |
| 5266229 | Stable electro-rheological fluid having a high viscosity-increasing effect | Hirotaka Tomizawa, Narihiko Yoshimura, Junichi Mitsui, Hiroshi Hirano | 1993-11-30 |
| 5266230 | Electroviscous fluid containing antioxidant and/or corrosion inhibitor | Hirotaka Tomizawa, Masahiko Hayafune | 1993-11-30 |