US PATENT SUBCLASS 441 / 91
.~.~.~ By pump

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

80  DF  WATER RESCUE OR LIFE PROTECTING APPARATUS {8}
88  DF  .~ Personal flotation device {9}
90  DF  .~.~ With mechanical inflation means {3}
91.~.~.~ By pump

DEFINITION

Classification: 441/91

By pump:

(under subclass 90) Device wherein the means for causing the expansion is a pump.