Patents by Inventor Walter P. Zahray

Walter P. Zahray 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).

  • International priority calling system with callback features
    Patent number: 5311583
    Abstract: A telephone call initiated from a first network and directed to a second network at which network resources are temporarily unavailable to route and/or switch that call, is completed by a) estimating the anticipated time before these resources can become available, b) offering the caller the option of being called back, based on that estimation, c) calling back the caller when network resources are expected to become available, d) establishing a connection from the first network to the called party at the second network, and e) merging the two calls.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: May 10, 1994
    Assignee: AT&T Bell Laboratories
    Inventors: Albert Friedes, Diane R. Leighton, Paramdeep S. Sahni, Walter P. Zahray