US PATENT SUBCLASS 416 / 81
.~ Flexible working member

Current as of: June, 1999
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416 /   HD   FLUID REACTION SURFACES (I.E., IMPELLERS)

79  DF  OSCILLATORY REACTION MOTION {4}
81.~ Flexible working member

DEFINITION

Classification: 416/81

(under subclass 79) Apparatus wherein the working member comprises pliant material.