Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7357107 | Valve system for internal combustion engine | Shuji Nagano, Toshihiko Oka | 2008-04-15 |
| 7107953 | Valve gear of an internal combustion engine | Norio Takayasu, Toshihiko Oka, Tetsushi Nagira, Satoshi Ando, Shinichi Murata | 2006-09-19 |
| 7007646 | Valve gear with cylinder suspending mechanism of an internal combustion engine | Norio Takayasu, Toshihiko Oka, Tetsushi Nagira, Satoshi Ando, Shinichi Murata | 2006-03-07 |
| 6883484 | Rocker shaft | Toshihiko Oka, Norio Takayasu | 2005-04-26 |
| 5237372 | Toner quantity detecting system for an image recording apparatus, a method of detecting the quantity of toner and a developing device for the image recording apparatus | Masato Ishii | 1993-08-17 |
| 5221952 | Means for separating image recording medium in electrophotographic recording apparatus | Masato Ishii, Hirohiko Kubo | 1993-06-22 |