Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875947 | Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property | Hisanobu Nakayama, Hiromichi Yasumoto, Seiichi Senoo, Youichi Zaizen, Kouji Yamasaki | 1989-10-24 |
| 4870436 | Close-up photographing device | — | 1989-09-26 |
| 4863531 | Method for producing a grain-oriented electrical steel sheet having a low watt loss | Toshiya Wada, Takatoshi Egawa, Makoto Yoshida, Seizun Higuchi, Teruaki Izaki | 1989-09-05 |
| 4846939 | Method for producing a grain-oriented electrical steel sheet having an ultra low watt loss | Makoto Yoshida, Seijun Higuchi, Teruaki Izaki | 1989-07-11 |
| 4825813 | Multi-pipe once-through type boiler | Yuji Yoshinari, Hitoshi Shiraishi, Akiyoshi Kawahito, Toshihiro Kayahara, Satoru Takeda +2 more | 1989-05-02 |
| 4817545 | Thread take-up lever device for sewing machines | Yoshio Mikuni | 1989-04-04 |