Patents by Inventor Andrew Cameron Duke

Andrew Cameron Duke 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).

  • Methods and apparatus for transmitting, receiving, and processing secure voice over internet protocol
    Patent number: 6272633
    Abstract: This disclosure describes systems and methods for processing voice data for secure transmission and secure receipt over a network, such as the Internet. The systems and methods include the processing of analog voice and digital information, including conversion of a voice signal into digital information (or of digital information into a voice signal) and transmission of digital information representing voice data over a network. The analog-to-digital conversion (and digital-to-analog conversion) includes coding and decoding digital information according to voice coding techniques and encrypting and decrypting digital information according to encryption techniques. The transmission of the digital information includes creation of a secure voice frame.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: August 7, 2001
    Assignee: General Dynamics Government Systems Corporation
    Inventors: Andrew Cameron Duke, Robert Michael Giramma, Ryan Charles Tomasetti