Patents by Inventor Tetsurou Itoh

Tetsurou Itoh 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).

  • Electromagnetic induction device with magnetic particles between core segments
    Patent number: 5204653
    Abstract: An electromagnetic induction device which comprises a split-type core assembly comprising at least one winding formed thereon and first and second core segments each having at least two joint faces spaced apart from each other, the first and second core segments are connected together with the joint faces of one of the first and second core segments held in contact with the joint faces of the other of the first and second core segments, and a finely divided ferromagnetic material is interposed between the joint faces of the respective first and second core segments. The ferromagnetic material used has an average particle size sufficient to form a magnetic fluid medium.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: April 20, 1993
    Assignee: Tabuchi Electric Co., Ltd.
    Inventors: Susumu Saitoh, Tetsurou Itoh, Naoki Kuroda