Patents by Inventor Mamoru Sakaguchi

Mamoru Sakaguchi 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).

  • Radio communication apparatus capable of producing an announce with a reduced error
    Patent number: 5214791
    Abstract: In a radio communication apparatus of a specific identification number, a control part (14) produces one of first and second control signals to make a loudspeaker (19) generate an announcement in response to a received radio signal carrying an intermittent succession of frames which are preassigned to the apparatus and each of which includes first and second codewords, each comprising a call number and received with a signal condition. The first control signal is produced in accordance with the identification number, the call number of the first codeword, and the signal condition of the second codeword. The second control signal is produced in accordance with the identification number, the call number of the second codeword, and the signal condition of the first codeword. The control part may additionally produce a third control signal.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: May 25, 1993
    Assignee: NEC Corporation
    Inventors: Shigeo Yoshizawa, Mamoru Sakaguchi