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Beenen - Flying Machines, British Patent 9864 of 1897 (1897)
Bernhard Reinhard Beenen · leaf 0
2 Jae py9-33522 QS ae Pee 5 eee a We ) Te A CES < Va > ate lea ae >a YY a SN <L< (tevetg GE, - wie , Fee. f. 2, G.12-17) yPatents · British patents · Flying machines · Aircraft · Helicopters
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