Patents by Inventor Richard G. McCallister

Richard G. McCallister 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).

  • System and method for communicating real-time facsimiles over data networks
    Patent number: 6483600
    Abstract: A system and method for communicating a facsimile reliably in real-time without using bandwidth inefficiently. A facsimile signal is created at a transmitting facsimile device and communicated to a transmitting gateway. The transmitting gateway demodulates the facsimile signal by using the modulation data rate at which the facsimile signal was sent. The image and any control information, with the exception of the DCS signal, are left coded such that processing time is not wasted on decoding the image. The facsimile signal is packetized and sent over the data network, such as the Internet. The facsimile signal is sent to a receiving gateway closest to the facsimile device that is the destination of the facsimile.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: November 19, 2002
    Assignee: 3Com Corporation
    Inventors: Guido M. Schuster, Richard G. McCallister, Sean Fendt