Patents by Inventor Norihiko Ohmuro

Norihiko Ohmuro 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).

  • Broad conical-mode helical antenna
    Patent number: 5910790
    Abstract: In a helical antenna where a helical conductor is spirally wound on a coaxial cable, spacings between turns of the helical conductor are changed in accordance with the positions of the turns.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: June 8, 1999
    Assignee: NEC Corporation
    Inventors: Norihiko Ohmuro, Akio Kuramoto, Kosuke Tanabe