Patents by Inventor Masatoyo Kubo

Masatoyo Kubo 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).

  • Pickup cartridge
    Patent number: 3975025
    Abstract: In a stereophonic pickup cartridge which derives two or more than two electric signals from a stereophonic sound recording disk of so-called 45.degree. -- 45.degree. type, there is provided a displacement-type pickup cartridge having an improved vibration transmission structure.
    Type: Grant
    Filed: July 20, 1973
    Date of Patent: August 17, 1976
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shuichi Obata, Akira Kagata, Katsuhiko Morita, Masatoyo Kubo, Masashi Itoh