Patents by Inventor Noriaki Goshi

Noriaki Goshi 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).

  • Rectangular magnetic circuit for speaker
    Patent number: 4412104
    Abstract: A magnetic circuit for a loudspeaker characterized in a substantially rectangular parellelepiped yoke provided with a hollow penetrating two opposed lateral faces thereof has a substantially rectangular parallelepiped sintered magnet mounted therein of a specified size and composition and having a recoil permeance coefficient from 1.0 to 1.2, a polepiece connected to the top surface of said parallelepiped sintered magnet forms a magnetic air gap with the end of a through hole formed in the top face of said rectangular yoke for a movable coil.
    Type: Grant
    Filed: November 21, 1979
    Date of Patent: October 25, 1983
    Assignee: Hitachi Metals, Ltd.
    Inventors: Osamu Fujita, Noriaki Goshi, Shinya Okayasu, Motoharu Shimizu, Nobuo Kakinuma