US PATENT SUBCLASS 441 / 46
.~.~.~ Barrel or drum


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

35  DF  RAFTS {8}
44  DF  .~ Columnar flotation member {1}
45  DF  .~.~ Hollow {1}
46.~.~.~ Barrel or drum


DEFINITION

Classification: 441/46

Barrel or drum:

(under subclass 45) Device wherein the buoyancy providing means is a cylinder of flat or slightly bulging sides having flat parallel ends and a ratio between the height and the diameter somewhat greater than one.