US PATENT SUBCLASS 441 / 22
.~.~ Fluid reaction surface

Current as of: June, 1999
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441 /   HD   BUOYS, RAFTS, AND AQUATIC DEVICES

1  DF  BUOY {6}
21  DF  .~ Having means to control attitude or position {3}
22.~.~ Fluid reaction surface

DEFINITION

Classification: 441/22

Fluid reaction surface:

(under subclass 21) Buoy wherein a surface is provided which reacts with a fluid to produce a force for controlling the attitude or position of the buoy.