Patents by Inventor Stephen C. DuVal

Stephen C. DuVal 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).

  • Patent number: 5818836
    Abstract: An anonymous telephone communication system. The system includes an anonymous voice system which can establish an anonymous telephone communication through a circuit switched network (CSN). In operation, two parties place separate telephone calls to the anonymous voice system through the CSN. The parties then enter matchcodes through their telephone keypads. The anonymous voice system compares the matchcodes entered by the parties and connects the telephone calls if the matchcodes match. The system may include an on-line data service that establishes electronic communication between the parties through corresponding data terminals. The data terminals may have resident anonymous voice input commands that can be selected by the parties. The on-line data service transmits a connect command to the anonymous voice system which dials the two parties, or waits for the parties to dial the system, and then connects the parties.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: October 6, 1998
    Inventor: Stephen C. DuVal