Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11185947 | Welding structure and welding method for metal member | Seiji Kumazawa | 2021-11-30 |
| 11161197 | Joined structure and joining method | Takayuki Hirose, Yasushi Taniguchi, Seiji Kumazawa | 2021-11-02 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11185947 | Welding structure and welding method for metal member | Seiji Kumazawa | 2021-11-30 |
| 11161197 | Joined structure and joining method | Takayuki Hirose, Yasushi Taniguchi, Seiji Kumazawa | 2021-11-02 |