Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7980232 | Four stroke internal combustion engine | Yoshiyuki Higaki, Osamu Takii | 2011-07-19 |
HS
Hirofumi Serikawa
Overall (All Time): #3,256,470 of 4,157,543Top 80%
1
Patents All Time