US PATENT SUBCLASS 238 / 261-- .~.~.~ Double and split keys

US PATENT SUBCLASS 238 / 261
.~.~.~ Double and split keys

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

151	DF	RAIL JOINTS {28}
243	DF	.~ Splice bars {18}
260	DF	.~.~ Fasteners {1}
261		.~.~.~ Double and split keys

DEFINITION

Classification: 238/261

Special fastening for splice-bar bolts. The double keys are usually duplicates reversely arranged.