Patents by Inventor Paul M. Duhaime

Paul M. Duhaime 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).

  • Coded telephone access system
    Patent number: 4611098
    Abstract: A telephone access system provides to the caller connection to an output upon receipt of a coded signal from the caller. Units are connected in sequence for receipt of each member of the coded signal. The caller has a predetermined period of time to enter the correct code or the system automatically hangs up. The system described uses TOUCH-TONE and all components are state of the art.
    Type: Grant
    Filed: December 4, 1984
    Date of Patent: September 9, 1986
    Inventors: Paul J. Giorgio, Paul M. Duhaime