Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9162307 | Alternating-current welding method and alternating-current welding device | Yoshiaki Tanaka, Yoshiyuki Tabata, Norikazu Oosaki | 2015-10-20 |
| 6127650 | Electromagnetic switch and welder using the same | Yoshimichi Yasuhara, Masayuki Okubo | 2000-10-03 |
| 6037566 | Arc welding apparatus for constant current and voltage characteristics cost and weight of which being reduced | Yoshimichi Yasuhara, Masayuki Okubo | 2000-03-14 |
| 6028290 | Arc welding apparatus | Yoshimichi Yasuhara, Masayuki Okubo | 2000-02-22 |