Patents by Inventor Michael Frank Atkin

Michael Frank Atkin 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).

  • Multi-frequency receiver circuits
    Patent number: 4119808
    Abstract: A receiver circuit for a multi-frequency telephone dialling system has means for validating a received tone by making successive measurements of the tone period and validating the tone when m of n successive measurements lie within a single one of a number of given ranges and when, subsequently, l(< m) of n successive measurements of the tone also lie within that single range.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: October 10, 1978
    Assignee: General Instrument Corporation
    Inventor: Michael Frank Atkin