US PATENT SUBCLASS 238 / 372
.~.~ Screw

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

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

DEFINITION

Classification: 238/372

Screw-spikes not adapted for general use, but only as track-fastening devices.

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303,