Patents Assigned to American Telephone and Telegraph Company - AT&T Teletype
  • Torsion spring powered door
    Patent number: 4804238
    Abstract: An access door has a frame formed with longitudinally extending channels which receive a closure element for sliding therealong. A torsion spring secured to the frame and to the closure element maintains the closure element in an open or closed position.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: February 14, 1989
    Assignee: American Telephone and Telegraph Company - AT&T Teletype
    Inventors: Albert Bischof, Norbert A. Rumps, Jr.
  • Combined printer support and paper handling platform
    Patent number: D298637
    Type: Grant
    Filed: November 1, 1985
    Date of Patent: November 22, 1988
    Assignee: American Telephone and Telegraph Company, AT&T Teletype Corp.
    Inventor: Eugene K. Sokolowski
  • Printer controller
    Patent number: D302682
    Type: Grant
    Filed: September 4, 1986
    Date of Patent: August 8, 1989
    Assignee: American Telephone and Telegraph Company, AT&T Teletype
    Inventors: David H. Bloom, Ralph Camporese, William C. Kastilahn, Robert J. Welch