Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363677 | Method for treating an electromagnetic steel sheet and an electromagnetic steel sheet having marks of laser-beam irradiation on its surface | Tadashi Ichiyama, Shigehiro Yamaguchi, Tohru Iuchi, Yozo Suga | 1982-12-14 |