Patents by Inventor Stevan C. Smith

Stevan C. Smith 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).

  • PBX DID and E and M tie trunk integration adapter and method
    Patent number: 4792967
    Abstract: A private branch exchange (PBX) direct in dailing (DID) and an E&M tie trunk voice message integration adapter and method is disclosed. The invention permits a calling party on a DID line to a desired extension connected to a PBX to be automatically connected to the called party's mailbox in a VMS when the called extension is busy or does not answer.
    Type: Grant
    Filed: February 20, 1986
    Date of Patent: December 20, 1988
    Assignee: Opcom
    Inventors: David J. Ladd, Stevan C. Smith