Patents by Inventor Rick Parfitt

Rick Parfitt 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).

  • Speech recognition system and method
    Patent number: 4394538
    Abstract: An apparatus for receiving spoken input training words and for subsequently recognizing a spoken input command word. For each training word, and for the command word, there is stored a time dependent array and a cumulative feature non-time-dependent vector. The command word array is compared, member-by-member, with each training word array. Also, the command word vector is compared, feature-by-feature, with each training word vector. The results of both comparisons are used for selecting the training word which most closely matches the command word.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: July 19, 1983
    Assignee: Threshold Technology, Inc.
    Inventors: Ben Warren, George M. White, Rick Parfitt, Peter Deng