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http://tobaccodocuments.org/preps/2081694455-4470.html

As a Footnote

US Patent + Trademark Office; Bryant, H.G., J.R.; Collins, P.F.; Pullman, J.O. "United States Patent 4,257,430 Tobacco Composition Including Palladium". 13 Feb 2001. Bates: 2081694455-2081694470.
http://tobaccodocuments.org/preps/2081694455-4470.html