Patents by Inventor Yasuhiro Mizota

Yasuhiro Mizota 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).

  • Time division multiple access radio communications system
    Patent number: 4713809
    Abstract: In a time division multiple access radio communication system constituted by a plurality of repeater stations and a plurality of terminals, only when the time slot in both the upward and downward directions is identical in a repeater station, the repeater station repeats data in the time slot. Downward data of a time slot used by a subscriber in an upward zone is not repeated to downward repeater stations, thereby saving power.
    Type: Grant
    Filed: July 21, 1986
    Date of Patent: December 15, 1987
    Assignee: NEC Corporation
    Inventor: Yasuhiro Mizota
  • Radio subscriber system with efficient use of radio frequency carrier waves
    Patent number: 4373205
    Abstract: A radio subscriber system switches between a plurality of radio link channels and seizes one responsive to an idle tone appearing thereon. A control circuit uses a microprocessor to select transmit and receive carrier frequencies for the seized channel. This selection is made by storing the channel identification in a random access memory while interrogating a read-only memory for channel frequency assignments. The control circuit identifies the seized circuit by channel signals which are demodulated when the seizure occurs.
    Type: Grant
    Filed: June 9, 1980
    Date of Patent: February 8, 1983
    Assignee: Nippon Electric Co., Ltd.
    Inventor: Yasuhiro Mizota