US PATENT SUBCLASS 305 / 47
.~ With sag prevention means

Current as of: June, 1999
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305 /   HD   WHEEL SUBSTITUTES FOR LAND VEHICLES

185  DF  TRACKS OR TREADS {14}
47.~ With sag prevention means {1}
48  DF  .~.~> Projecting truss type {1}

DEFINITION

Classification: 305/47

(under subclass 185) Apparatus in which means are provided on the track treads to prevent the track from flexing in one direction.