Patents Assigned to SBC Operations, Inc.
  • Identification of calling devices dialing a universal number to access a telecommunications relay service center
    Patent number: 7809121
    Abstract: A dialed universal telephone number is translated into a toll free telephone number corresponding to a telecommunications relay service center in a telecommunications system. When the call is connected to the telecommunications relay service center, information that identifies the caller is reliably forwarded to the telecommunications relay service center.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: October 5, 2010
    Assignees: AT&T Intellectual Property I, L.P., SBC Operations, Inc.
    Inventors: Carol Shifrin Gruchala, Harold C. Fleischer, III, Judy Mandolini