Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4646803 | Case for protecting a magnetic core | Katsumi Hanaoka, Yasuo Yamamoto, Kazuhiro Tanaka | 1987-03-03 |
| 4637563 | Toroidal winding apparatus | Teruaki Tanaka, Nobuyuki Sumida, Kouhei Arisaka | 1987-01-20 |
| 4631509 | Electrical induction apparatus with support inside casing | Yasuo Yamamoto, Nobuyuki Sumida, Katsumi Hanaoka, Kazuhiro Tanaka | 1986-12-23 |