Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5012792 | Rotary blade and a rotary substrate for use in the rotary blade | Azuma Kawata, Shuichiro Koroku, Hirofumi Kano | 1991-05-07 |
| 4689919 | Method for welding cutter segments | Takao Kawakita | 1987-09-01 |