US PATENT SUBCLASS 434 / 214
.~.~ Property of circle or ellipse

Current as of: June, 1999
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434 /   HD   EDUCATION AND DEMONSTRATION

188  DF  MATHEMATICS {4}
211  DF  .~ Geometry, trigonometry, or physical mathematic model structure {5}
214.~.~ Property of circle or ellipse

DEFINITION

Classification: 434/214

Property of circle or ellipse:

(under subclass 211) Subject matter relating to characteristics of a closed plane curve every point of which is equidistant from a fixed point within the curve, or characteristics of a closed plane curve generated about two points in such a way that the sums of its distances from two fixed points is a constant.