Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6127650 | Electromagnetic switch and welder using the same | Masafumi Naruto, Masayuki Okubo | 2000-10-03 |
| 6037566 | Arc welding apparatus for constant current and voltage characteristics cost and weight of which being reduced | Masafumi Naruto, Masayuki Okubo | 2000-03-14 |
| 6028290 | Arc welding apparatus | Masafumi Naruto, Masayuki Okubo | 2000-02-22 |