Patents by Inventor by Michiko Yamamoto, heiress

by Michiko Yamamoto, heiress has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fabrication method for transformers with an amorphous core
    Patent number: 5226222
    Abstract: A method for fabricating transformers each having a core made from a lamination body of strips made of an amorphous magnetic alloy comprises the steps of forming a ring-like lamination body using a grindstone cutter and a gas coolant to obtain a developed lamination body, shaping the developed lamination into a substantially rectangular core, assembling windings with the core using a sliding tool for inserting leg portions of the core into windows of windings, covering the core with a core cover and mounting a grounding member so as to ground the core to the ground.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: July 13, 1993
    Assignee: Daihen Corporation
    Inventors: Katsumi Hanaoka, Masatake Hirai, Masatake Kokado, Takeshi Uchikura, Nobuyuki Sumida, Syoichi Shii, Koichi Akimoto, Tadanori Matsubayashi, Toshio Fujiwara, Yasuo Yamamoto, deceased, by Michiko Yamamoto, heiress, Masako Sakamoto, heiress, Kyoko Kan, heiress