Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4249063 | Circuit for high frequency arc welding apparatus using a low frequency switch | Hitoshi Kawano, Mitsuhiro Hayashi | 1981-02-03 |
| 4192987 | High frequency arc welding method and apparatus | Hitoshi Kawano, Mithuhilo Hayashi | 1980-03-11 |