Patents by Inventor Calvin F. Herman

Calvin F. Herman 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).

  • Differential pulse code modulation
    Patent number: 3988729
    Abstract: A new and improved differential pulse code modulation (DPCM) encoding and decoding method and apparatus which is capable of transmission with minimum bandwidth, is not affected by data transition density, requires no direct current (DC) response of the transmission link, and suffers from minimal ambiguity in resolution of the digital data.
    Type: Grant
    Filed: January 29, 1975
    Date of Patent: October 26, 1976
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventor: Calvin F. Herman