US PATENT SUBCLASS 104 / 135
.~ Roller track

Current as of: June, 1999
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104 /   HD   RAILWAYS

134  DF  SLEDWAYS {2}
135.~ Roller track

DEFINITION

Classification: 104/135

(under subclass 134) Sledways having the track-surface made up of a series of rollers, over which the nonwheeled vehicles slide.