Patents by Inventor George Howell

George Howell 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).

  • Data transmission systems
    Patent number: 4071692
    Abstract: Intelligence is conveyed in a PCM bit stream form with alternate bits being inverted. Additional information is conveyed by violations of the alternate bit rule so that two successive bits have the same polarity. Prior to being coupled to the alternate mark inversion coder a pseudo-random bit stream is mixed by binary addition without carry to the intelligence bit stream to maintain low DC level in the transmitted mixed bit stream and to maintain bit transitions relatively high.
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: January 31, 1978
    Assignee: International Standard Electric Corporation
    Inventors: Donald A. Weir, Eric S. Usher, George A. Howells