Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5226222 | Fabrication method for transformers with an amorphous core | Katsumi Hanaoka, Masatake Kokado, Takeshi Uchikura, Nobuyuki Sumida, Syoichi Shii +7 more | 1993-07-13 |
| 5055815 | Stationary induction electric apparatus | Yasuo Yamamoto, Katsumi Hanaoka, Toshiko Yamada | 1991-10-08 |
| 5013956 | Lining material and ultrasonic wave driven motor using lining material | Seiji Kurozumi, Shigenori Uda, Katuhiro Murano, Takeo Kimura, Nobuyuki Yamamoto | 1991-05-07 |
| 4972573 | Method of manufacturing wound transformer cores | Yasuo Yamamoto, Katsumi Hanaoka, Nobuyuki Sumida, Masatake Kokado | 1990-11-27 |
| 4970776 | Method of manufacturing a stationary induction electric apparatus | Yasuo Yamamoto, Katsumi Hanaoka | 1990-11-20 |
| 4649248 | Annealing furnace for annealing magnetic cores in a magnetic field | Hiroshi Yamaguchi, Teruaki Tanaka, Tadashi Kohketsu, Masahiro Matsumoto, Kenji Kawate | 1987-03-10 |
| 4639707 | Transformer with toroidal magnetic core | Kazuhiro Tanaka, Yasuo Yamamoto, Katsumi Hanaoka | 1987-01-27 |