Patents by Inventor Mitsuyoshi Morinaga

Mitsuyoshi Morinaga 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).

  • Patent number: 4212470
    Abstract: A head shell for pick-up arms and method of making same comprising a flat part for mounting a cartridge formed by machine-pressing a part of a tubular member and a connector mounted at the opening of the remaining tubular part.
    Type: Grant
    Filed: September 13, 1978
    Date of Patent: July 15, 1980
    Assignee: Trio Kabushiki Kaisha
    Inventor: Mitsuyoshi Morinaga
  • Patent number: 4212490
    Abstract: A head shell for pick-up arms and method of making same comprising a flat part for mounting a cartridge formed by machine-pressing a part of a tubular member and a connector mounted at the opening of the remaining tubular part.
    Type: Grant
    Filed: September 13, 1978
    Date of Patent: July 15, 1980
    Assignee: Trio Kabushiki Kaisha
    Inventors: Mitsuyoshi Morinaga, Yasuo Kishida
  • Patent number: 4202550
    Abstract: Improved lead wires for use with a stereo record playback system where at least a pair of left channel wires and at least a pair of right channel wires extend from a pick-up device through a tone arm to a stereo amplifier, the lead wires including a ground wire and the left and right channel wires, the ground wire being disposed between the left channel wires and the right channel wires to provide electrical isolation therebetween and the ground wire and left and right channel wires being bonded together as a single unit so that the electrical isolation is implemented within the tone arm without the addition of undue weight to the arm. The right channel wires may be twisted together as may the left channel wires. The ground wire and left and right ground wires may all be separated and unbonded from one another at least at the area of the pivot of the tone arm to facilitate rotation thereof.
    Type: Grant
    Filed: April 13, 1978
    Date of Patent: May 13, 1980
    Assignee: Trio Kabushiki Kaisha
    Inventor: Mitsuyoshi Morinaga