Patents by Inventor Richard W. Hamming

Richard W. Hamming 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).

  • Multisection filter using inflected amplitude change function to sharpen its band-edge responses
    Patent number: 4074212
    Abstract: A signal to be filtered is subjected to a known filter function a sufficient plurality of times and with appropriate processing to produce in a plot of the total filtering response versus the response of one such function at least one inflection in a portion of the plot corresponding to a transition band between a passband and a stopband of the filter function. Various embodiments of the overall filtering function are shown which are applicable to both recursive and nonrecursive filters and to filters having either single or multiple sets of passband and stopband combinations per filter function.
    Type: Grant
    Filed: December 16, 1976
    Date of Patent: February 14, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Richard W. Hamming, James F. Kaiser