Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4333431 | Water-cooled two stroke engine having exhaust port timing control valve means | Toshimitsu Iio | 1982-06-08 |
YY
Yuusaku Yamaoka
Overall (All Time): #4,070,890 of 4,157,543Top 100%
1
Patents All Time