Patents by Inventor Daniel D. Tagatac

Daniel D. Tagatac 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).

  • Blocked call notification system
    Patent number: 5463683
    Abstract: A method and a system allow an inbound telecommunications subscriber to receive notification of blocked calls directed to that subscriber and other information associated with calls that are blocked due to lack of available egress facilities at the subscribers' premises communications systems.
    Type: Grant
    Filed: December 28, 1993
    Date of Patent: October 31, 1995
    Assignee: AT&T Corp.
    Inventors: Cynthia B. Collins, Young Lee, Daniel D. Tagatac