US PATENT SUBCLASS 238 / 373
.~.~.~ Sockets

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

310  DF  FASTENINGS {12}
366  DF  .~ Spikes {9}
372  DF  .~.~ Screw {1}
373.~.~.~ Sockets

DEFINITION

Classification: 238/373

Sockets for screw-spikes. These sockets form either a portion of the tie structure or a portion of the rail-seat.