(under subclass 390.01) Subject matter in combination with means to determine one or more physical quantities of an object.
SEE OR SEARCH THIS CLASS, SUBCLASS:
308, for beta thickness gauges.
358.1+, for means to inspect passive solid objects.
SEE OR SEARCH CLASS
378, X-Ray or Gamma Ray Systems or Devices,
50, for thickness or density analysis using fluorescence, subclasses 54+ for thickness or density analysis using absorption, and subclass 89 for thickness or density analysis using scatter.
