Patents by Inventor Ryuichi Suda

Ryuichi Suda 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).

  • Non-linear coder for pulse code modulation of telephone signals or the like
    Patent number: 4021800
    Abstract: A non-linear coder for use in a time-division multiplex pulse code modulation telephone transmission system is disclosed. Non-linear coding is accomplished by the selection of each segment that is necessary for coding by control pulses in accordance with the magnitude of an analog input signal. This is implemented in the feedback loop of the non-linear coder logic which selects among switching circuits in a local decoder a desired group of switching circuits in response to the input analog level.
    Type: Grant
    Filed: April 16, 1975
    Date of Patent: May 3, 1977
    Assignee: Nippon Electric Company, Ltd.
    Inventors: Yoshio Katagiri, Ryuichi Suda