US PATENT SUBCLASS 238 / 73-- .~.~.~.~ Vertical telescope

US PATENT SUBCLASS 238 / 73
.~.~.~.~ Vertical telescope

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

29	DF	TIES {9}
54	DF	.~ Cross section {6}
70	DF	.~.~ Tubular {4}
72	DF	.~.~.~ Rectangular {6}
73		.~.~.~.~ Vertical telescope

DEFINITION

Classification: 238/73

Ties of rectangular box form with overlapping side plates having vertical telescopic engagement.