Patents by Inventor Stephen W. Handy

Stephen W. Handy 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).

  • Password controlled switching system
    Patent number: 4896346
    Abstract: A password controlled switching system and method of operation for enrolling and storing passwords identifying lines and trunks of the switching system denied access thereto by other lines and trunks and which is operable upon a match of a calling party command with an enrolled and stored password for selectively interconnecting the calling party via a line with ones of the restricted lines and trunks.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: January 23, 1990
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: William R. Belfield, William J. Erwin, Thomas J. Geers, Jr., Roy V. Grubbe, Stephen W. Handy, Robert J. Perdue