Patents by Inventor C. David Thomas

C. David Thomas 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).

  • Media monitor
    Patent number: 5768680
    Abstract: The instant invention is an electronic audio monitor and recording device designed to be worn upon the person, in connection with audience research systems, for purposes of capturing special identifying signals embedded in audio and video programs, appending the date and time each signal is received, and recording and retaining the data until it is transferred for further processing.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: June 16, 1998
    Inventor: C. David Thomas