Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7918056 | Underground shelter | — | 2011-04-05 |
| 5171958 | High-efficiency fillet welding method for steel plate | Yoshimitsu Meguro, Saburo Hayashi, Matsushige Nakajima | 1992-12-15 |
| 5004884 | Method of submerged arc welding a thick steel plate with large heat input and submerged arc welding flux | Shuichi Sakaguchi, Itaru Yamashita | 1991-04-02 |
| 4442340 | Four-electrode submerged arc welding process | Fumimaru Kawabata, Atsushi Shiga | 1984-04-10 |