Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4247223 | Rock bolt | Toshinari Amakasu, Koetsu Fukui | 1981-01-27 |
YS
Yoshito Seto
Overall (All Time): #4,082,512 of 4,157,543Top 100%
1
Patents All Time