Patents by Inventor Anthony J. Richardson

Anthony J. Richardson 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).

  • Uniform mass sensitivity thickness shear mode quartz resonator
    Patent number: 8215171
    Abstract: A ring electrode design that produces a uniform mass sensitivity distribution across a TSM device is presented. A new technique and apparatus to measure this mass sensitivity distribution is also presented. Novel electrode geometries on thickness shear mode (TSM) quartz resonators achieve radial uniformity of mass sensitivity, how receptive the device is to mass loadings, and high frequency stability across the active sensing area of the sensor device. The device allows for absolute mass measurement down to the nanogram level. Fabricated devices utilizing model predictions were tested using this apparatus, and good agreement between theory and experiment is found.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: July 10, 2012
    Assignee: University of South Florida
    Inventors: Allan Smith, Charity F. Smith, legal representative, Venkat R. Bhethanabotla, Anthony J. Richardson