Patents by Inventor Mankichi Yamada

Mankichi Yamada 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).

  • Corona shielding by jumper assembly
    Patent number: 4121045
    Abstract: A corona shield employing a jumper assembly is provided for tension insulator strings which comprises a plurality of jumper wires extending over the energized ends of an insulator string for shielding the ends thereof and line hardware on the energized side, thereby preventing corona discharge therefrom.
    Type: Grant
    Filed: September 7, 1977
    Date of Patent: October 17, 1978
    Assignee: NGK Insulators, Ltd.
    Inventors: Mankichi Yamada, Hiroshi Fujita