US PATENT SUBCLASS 441 / 17
.~.~.~.~.~ Having water activated switch

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

1  DF  BUOY {6}
6  DF  .~ Marker buoy {2}
11  DF  .~.~ With signalling device {4}
13  DF  .~.~.~ Illuminating {2}
16  DF  .~.~.~.~ Electric light {2}
17.~.~.~.~.~ Having water activated switch

DEFINITION

Classification: 441/17

Having water activated switch:

(under subclass 16) Buoy wherein the electric lamp is controlled by a mechanical means which makes or breaks a circuit upon its submergence.