Patents by Inventor David M. Tutelman

David M. Tutelman 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 communication method and circuitry
    Patent number: 4601035
    Abstract: A data communication method and circuitry which uses a compatible subset of a standard high level data link control (HDLC) protocol to control link level communication between a digital terminal and a switch. The use of the subset of HDLC protocol reduces the complexity of the digital terminal design while maintaining communication compatibility with a switch which uses either the standard HDLC protocol or the subset of HDLC protocol.
    Type: Grant
    Filed: October 3, 1983
    Date of Patent: July 15, 1986
    Assignees: AT&T Bell Laboratories, AT&T Information Systems
    Inventors: Richard P. Marzec, George W. Schramm, John B. Sharp, David J. Stelte, David M. Tutelman