Patents by Inventor John P. Claassen

John P. Claassen 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).

  • Robust and intelligent bearing estimation
    Patent number: 6049510
    Abstract: A method of bearing estimation comprising quadrature digital filtering of event observations, constructing a plurality of observation matrices each centered on a time-frequency interval, determining for each observation matrix a parameter such as degree of polarization, linearity of particle motion, degree of dyadicy, or signal-to-noise ratio, choosing observation matrices most likely to produce a set of best available bearing estimates, and estimating a bearing for each observation matrix of the chosen set.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: April 11, 2000
    Assignee: Sandia Corporation
    Inventor: John P. Claassen
  • Wind-up flashlight
    Patent number: D555266
    Type: Grant
    Filed: February 23, 2007
    Date of Patent: November 13, 2007
    Assignee: National Broom Co. of California
    Inventor: John P. Claassen