Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7530870 | Drive shaft sealing device for small watercraft | Hiroyuki Kishimoto, Tetsuya Mashiko, Syuuji Fujita | 2009-05-12 |
HK
Hirohiko Kakuyama
Overall (All Time): #3,324,951 of 4,157,543Top 80%
1
Patents All Time