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U.S. patents available from 1976 to present.
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"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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Number of patents: 1
Last date: April 22, 1997

Number	Title	Issue Date
5622646	Bleach compositions comprising metal-containing bleach catalysts and antioxidants Bleaching compositions useful for laundering fabrics comprising a metal bleach catalyst and an effective amount of an antioxidant....	04/22/1997