US PATENT SUBCLASS 73 / *
.~ Tank type

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

861  DF  VOLUME OR RATE OF FLOW {23}
*.~ Tank type {3}
217  DF  .~.~> Rotary tank or bucket {1}
219  DF  .~.~> Plural measuring chamber {3}
223  DF  .~.~> Single measuring chamber {2}