US PATENT SUBCLASS 441 / 63
.~.~ With lock or latch

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

55  DF  SWIMMING AID TO INCREASE STROKE EFFICIENCY {4}
61  DF  .~ Foot attached {3}
63.~.~ With lock or latch

DEFINITION

Classification: 441/63

With lock or latch:

(under subclass 61) Device having means to hold or secure the water-contacting surface in a predetermined position.