Patents Assigned to American Telephone and Telegraphy Company
  • Communications workstation
    Patent number: D305538
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: January 16, 1990
    Assignees: American Telephone and Telegraphy Company, AT&T Information Systems Inc.
    Inventors: Arthur H. Gilmore, Chris G. Johnson, Norman W. Petty, Barbara A. Seelye, Thomas J. Tierney, Jr.