Patents by Inventor Richard S. Burwen

Richard S. Burwen 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).

  • Patent number: 8041045
    Abstract: An electronic reverberation system employs a processor to produce a plurality of delays samples that are added to a direct signal to produce reverberant sound. The disclosed system generates or employs a list of gain value pairs that are produced based on control settings or are provided as fixed coefficients. The processor generates reverberation samples by applying these coefficients to delay samples and summing their amplitudes to produce reverberation waveform samples. The reverberation waveform samples are added to the direct signal.
    Type: Grant
    Filed: October 21, 2005
    Date of Patent: October 18, 2011
    Inventor: Richard S. Burwen
  • Patent number: 4290431
    Abstract: An apparatus and method for measuring and monitoring blood oxygen content and local perfusion factor. A transcutaneous gas measurement probe is heated by application of an electric current to a semi-conductor device housed therein. The heat developed in a semi-conductor device heats the probe to a constant temperature under the control of a temperature monitoring and regulating circuit and the amount of power applied to the semi-conductor device is measured by multiplying the current conducted through the semiconductor device by the voltage across it to provide a measurement of local perfusion factor. An alerting device is provided to signal when blood oxygen content and local perfusion factor are outside a predetermined acceptable range.
    Type: Grant
    Filed: June 21, 1979
    Date of Patent: September 22, 1981
    Assignee: Novametrix Medical Systems, Inc.
    Inventors: Normand C. Herbert, Richard S. Burwen, Richard A. Mentelos