US PATENT SUBCLASS 238 / 305
.~ Rotary

Current as of: June, 1999
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238 /   HD   RAILWAYS: SURFACE TRACK

287  DF  TIE-PLATES {16}
305.~ Rotary

DEFINITION

Classification: 238/305

Tie-plates adapted for slight rotation when placed in final seated position. The rotation locks the rail in place.