US PATENT SUBCLASS 104 / 145
.~ Grip or plow traps

Current as of: June, 1999
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104 /   HD   RAILWAYS

140  DF  SLOTTED CONDUIT {4}
145.~ Grip or plow traps

DEFINITION

Classification: 104/145

(under subclass 140) Apparatus comprising conduit enlargements and surface trap-doors for conduits for facilitating the insertion and removal of electric plow shoes or cable-grippers and devices for handling the trap-doors, plows, or grippers.