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

"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."

Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830

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Class 238/195 - Angle

Subclass of Class 238 - Railways: surface track
Definition: An angle-chair has a horizontal flange under the rail-bases
No. of patents: 0