US PATENT SUBCLASS 441 / 2
.~ With means to call buoy to surface

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

1  DF  BUOY {6}
2.~ With means to call buoy to surface

DEFINITION

Classification: 441/2

With means to call buoy to surface:

(under subclass 1) Buoy normally lying submerged under a body of water and including means to cause the buoy to surface in response to a transmitted signal.