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

"What can be more palpably absurd than the prospect held out of locomotives traveling twice as fast as stagecoaches?"

The Quarterly Review ; March edition, 1825

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Class 238/49 - Old rail

Subclass of Class 238 - Railways: surface track
Definition: Ties in which old rails are utilized to make up the ties.
No. of patents: 0