Patents by Inventor Tomoo Maeda

Tomoo Maeda 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).

  • Method of manufacturing superfine magnetic metal powder
    Patent number: 4948422
    Abstract: In the present invention, reaction is carried out between hydrogen gas and a metal halide vapor while supplying to the reacting region an active gas whose reactivity with the metal halide vapor is higher than the reactivity of the hydrogen gas with the metal halide vapor. The particular technique permits efficiently manufacturing a superfine magnetic metal powder of satisfactory properties while minimizing the amount of the hydrogen gas used.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: August 14, 1990
    Assignees: Akinori Yoshizawa, Nippon Kokan Kabushiki Kaisha
    Inventors: Akinori Yoshizawa, Tomoo Maeda, Masayuki Yamato