Patents by Inventor Tooru Mizumoto

Tooru Mizumoto 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).

  • Cordless telephone apparatus including an antenna gain switching circuit
    Patent number: 5305373
    Abstract: A cordless telephone apparatus comprising a base station telephone set, which is connected to a wire telephone network, and a plurality of portable radio telephone sets coupled by said base station telephone set and a radio network, and the portable radio telephone sets having a comparator for comparing a receive signal with a reference signal and a gain switching circuit for switching an antenna gain in accordance with the compared result of the comparator.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: April 19, 1994
    Inventor: Tooru Mizumoto