U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

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Class 238/90 - Closed loop


Subclass of Class 238 - Railways: surface track
Definition: Internal-reinforcement members of loop form for cement ties.
No. of patents: 1
Last issue date: 11/30/1976


NumberTitleIssue Date
3994436Composite railway tie
The composite railway tie has performances which are substantially improved over those of ties of the prior art while it results in a saving in weight of metal necessary and in the cost of manufacture. The reinforcement of this tie comprises a lower assembly a... 		11/30/1976
 
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