Hackenberger, A.L. 13/01/2025Terry 1930San Antonio TX.USA 6 November 1936 Assignment of Royalty Earning Interests In Patent Rights of the Hackenberger Helioplane – courtesy Jennifer Daniel 1938Las Vegas NV.USA Airplane builder Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Like Loading... Related
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