US PATENT SUBCLASS 446 / 39
.~.~.~.~ Including resilient actuator

Current as of: June, 1999
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446 /   HD   AMUSEMENT DEVICES: TOYS

34  DF  AERODYNAMICALLY SUPPORTED OR RETARDED {8}
36  DF  .~ Including rotary wing (e.g., helicopter, flying propeller, autogyro, etc.) {2}
37  DF  .~.~ And means to rotate wing {2}
38  DF  .~.~.~ Separable rotating means {3}
39.~.~.~.~ Including resilient actuator

DEFINITION

Classification: 446/39

Including resilient actuator:

(under subclass 38) Device wherein the detachable means includes an elastically deformable material which is deformed to store energy and then released to rotate the airfoil.

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260, for a spring impeller for a top.