Patents by Inventor Christopher Aaron Hall

Christopher Aaron Hall 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).

  • Voice security between a composite channel telephone communications link and a telephone
    Patent number: 6256491
    Abstract: An apparatus and method for security of individual communications over a composite communications channel such as T1 or E1. The composite channel is digitized. Individual channels are separated, but identifying information of each channel is retained. A level of security can be chosen for each channel by digitally processing the selected call with a selected level of scrambling or encryption prior to passing the call to an end-user.
    Type: Grant
    Filed: December 31, 1997
    Date of Patent: July 3, 2001
    Assignee: Transcript International, Inc.
    Inventors: Douglas E. Ehlers, Christopher Aaron Hall, James R. Holthaus