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Stingray's List of Rotorcraft -> Stingray's Rotorcraft Forum -> Patents -> Joseph S. Pecker Aircraft Having Sustaining Rotors
Post Info TOPIC: Joseph S. Pecker Aircraft Having Sustaining Rotors
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Date: Feb 26, 2016
Joseph S. Pecker Aircraft Having Sustaining Rotors
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https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/US1999737.pdf



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