US PATENT SUBCLASS 440 / 14
.~ Fishtail motion propelling means

Current as of: June, 1999
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440 /   HD   MARINE PROPULSION

13  DF  OSCILLATING PROPELLING MEANS {3}
14.~ Fishtail motion propelling means {1}
15  DF  .~.~> Flexible

DEFINITION

Classification: 440/14

Fishtail motion propelling means:

(under subclass 13) Device wherein the propelling means moves through the water with a side-to-side or whipping motion, generally imitating the motion of the tail of a fish.