Memoria: Patents form Nº 3, 16.484. Patents and designs acts 1907 and 1919. Nº 2.156, dated 25-01-1926. Complete specification. «Improvements in or relating to aircraft with rotative wings»
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Memoria: Patents form Nº 3, 16.484. Patents and designs acts 1907 and 1919. Nº 2.156, dated 25-01-1926. Complete specification. «Improvements in or relating to aircraft with rotative wings»
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