Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4629362 | Shield tunneling machine | Norio Kainuma, Akira Tanaka, Yoshio Yanagi | 1986-12-16 |
| 4575972 | Grinding machine for use with rolling mill | Toshio Ohki, Masaomi Matsumoto, Keinosuke Tokushige, Shuji Hoshino | 1986-03-18 |