Patents by Inventor Kuninori Imai

Kuninori Imai 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 a low energy-loss waveguide circuit element
    Patent number: 3955274
    Abstract: A method of manufacturing low energy-loss waveguide circuit elements in which a film of metal with low resistivity is laid on the surface of a base metal and a hard metal die of a desired shape is pressed into the base metal through the metal film, so that a plastic strain is caused in the base metal thereby to form a recessed portion in the base metal, while at the same time welding the metal film to the base metal to cover the internal surface of the recessed portion with the metal film.
    Type: Grant
    Filed: December 30, 1974
    Date of Patent: May 11, 1976
    Assignees: Hitachi Electronics, Ltd., Hitachi, Ltd.
    Inventors: Kuninori Imai, Akihiko Higurashi