Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5324434 | Water purifying apparatus | Yukio Oikawa, Shiro Saito, Mitsuhiro Hayamizu | 1994-06-28 |
| 5281330 | Water purifier | Yukio Oikawa, Shiro Saito | 1994-01-25 |
| 4844793 | Fuel heating type fuel filter device | Kouji Izutani | 1989-07-04 |
| 4539108 | Fuel heating type fuel filter device | Kouji Izutani, Akio Nara, Hidetaka Hayashi | 1985-09-03 |