US PATENT SUBCLASS 73 / 861.13
.~.~.~.~ Including permanent magnet or D.C. field

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

861  DF  VOLUME OR RATE OF FLOW {23}
861.08  DF  .~ By measuring electrical or magnetic properties {2}
861.11  DF  .~.~ Electromagnetic induction (e.g., Faraday type) {1}
861.12  DF  .~.~.~ With detecting electrodes {4}
861.13.~.~.~.~ Including permanent magnet or D.C. field

DEFINITION

Classification: 73/861.13

Including permanent magnet or D.C. field:

(under subclass 861.12) Subject matter wherein the applied magnetic field is produced by a permanent magnet or by an electromagnet supplied with a constant and continuous field current.