US PATENT SUBCLASS 73 / 455
.~ Propeller, impeller, or fluid coupling

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

66  DF  ROTOR UNBALANCE {7}
455.~ Propeller, impeller, or fluid coupling {1}
456  DF  .~.~> Single blade balancing

DEFINITION

Classification: 73/455

(under subclass 66) Subject matter relating to propellers, impellers, and fluid couplings.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, for a study of aerodynamic and hydrodynamic properties of propellers and impellers.