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

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.