Patents by Inventor Andrew Ullmann

Andrew Ullmann 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 providing call quality testing
    Patent number: 8737571
    Abstract: A method, apparatus and computer readable medium for call quality testing is presented. A query is transmitted over a communications network from a first location to a second location. The query results in an audio signal at the second location, which is received at the first location. The audio signal is analyzed by comparing the signal with a reference signal clip. A statistical parameter is generated, the statistical parameter indicative of a quality of the received signal.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: May 27, 2014
    Assignee: Empirix Inc.
    Inventors: Albert R. Seeley, Nathan David, Zhongyi Chen, Douglas C. Williams, Andrew Ullmann