Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5226222 | Fabrication method for transformers with an amorphous core | Katsumi Hanaoka, Masatake Hirai, Takeshi Uchikura, Nobuyuki Sumida, Syoichi Shii +7 more | 1993-07-13 |
| 4972573 | Method of manufacturing wound transformer cores | Yasuo Yamamoto, Katsumi Hanaoka, Masatake Hirai, Nobuyuki Sumida | 1990-11-27 |