US PATENT SUBCLASS 73 / 1.18
.~.~ Sphere

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.16  DF  .~ Volume of flow, speed of flow, volume rate of flow, or mass rate of flow {12}
1.18.~.~ Sphere

DEFINITION

Classification: 73/1.18

Sphere:

(under subclass 1.16) Subject matter wherein the movement of a three-dimensional surface, having all points of which are equidistant from a fixed point (e.g., a ball), is used for introducing a known flow volume.