Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4413929 | Rock bolt | Kouetsu Fukui | 1983-11-08 |
TK
Tomio Kigawa
Overall (All Time): #4,060,459 of 4,157,543Top 100%
1
Patents All Time