Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6705616 | Piston ring device in internal combustion engine | Noriaki Fujii, Kinya Fujii | 2004-03-16 |
KS
Kazuyuki Seko
Overall (All Time): #3,472,968 of 4,157,543Top 85%
1
Patents All Time