US PATENT SUBCLASS 73 / 30.02
.~.~ By pressure measurement

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

23.2  DF  GAS ANALYSIS {15}
30.01  DF  .~ Density or specific gravity {3}
30.02.~.~ By pressure measurement

DEFINITION

Classification: 73/30.02

By pressure measurement:

(under subclass 30.01) Subject matter wherein pressure is

measured in order to determine density or specific gravity of gas.