US PATENT SUBCLASS 104 / 146
.~ Adjustable slots

Current as of: June, 1999
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104 /   HD   RAILWAYS

140  DF  SLOTTED CONDUIT {4}
146.~ Adjustable slots

DEFINITION

Classification: 104/146

(under subclass 140) Conduit construction provided with slots, in which means are provided for laterally adjusting the slot-irons to increase or diminish the width of the slot.