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Keywords: WrightPatentIntro.jpg Cropped image showing first two paragraphs of the Wright Brothers' 1906 patent for the airplane Available at U S Patent and Trademark Office website http //www uspto gov/patft/index html Enter number 821393 in Patent Number Search box Viewing software required; a small free quick download Info on viewer at this help link http //www uspto gov/patft/help/images htm PD-old PD-US-patent Wright brothers |