US PATENT SUBCLASS 418 / 205
.~ Like rotary members

Current as of: June, 1999
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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

191  DF  INTERENGAGING ROTATING MEMBERS {9}
205.~ Like rotary members {1}
206.1  DF  .~.~> Having each radial protuberance of like dimension {8}

DEFINITION

Classification: 418/205

(under subclass 191) Apparatus in which each of the interengaging rotary members has the same dimensions and configurations.