Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6003485 | Helical intake port for an internal combustion engine | Junichi Kawashima, Toshifumi Nishimura | 1999-12-21 |
SN
Seiji Niinuma
Overall (All Time): #3,671,617 of 4,157,543Top 90%
1
Patents All Time