Patent. Pictorial representation on a transparent carrier

by Friedrich Kroner

$250 · Offered by Rootenberg Rare Books

Washington, DC: United States Patent Office. October 19, 1937. 2 volumes. 3 pp. Full page illustration on verso of top wrapper. Accompanied by oblong booklet entitled Ford V8 Motor, with 16 pages of transparencies 8 double-sided . Together the transparencies illustrate an automobile engine, with each transparency showing parts of the engine on both sides. Item #14501 The invention patented by Kroner “relates to a

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