Patents by Inventor Steven M. Gelfond

Steven M. Gelfond 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).

  • ISDN interface
    Patent number: 5291493
    Abstract: Disclosed is a method and apparatus for transferring data in an Integrated Services Digital Network (ISDN) system. Certain system information bits are displaced into time slot zero to permit the transmission of the B2 channel bits in the same assigned time slots as the B1 channel. D channel bits are also assigned to unused time slots.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: March 1, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: James R. Brock, Steven M. Gelfond