US PATENT SUBCLASS 441 / 10
.~.~.~ Responsive to hydrostatic pressure

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}
7  DF  .~.~ Having means to release buoy upon submergence {3}
10.~.~.~ Responsive to hydrostatic pressure

DEFINITION

Classification: 441/10

Responsive to hydrostatic pressure:

(under subclass 7) Buoy wherein the securing means is activated by a device which is sensitive to changes in liquid pressure.