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Patents > Applicant firm: None & Tech fields : Airplane or propeller & National tech categories: DE 77h.5

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Ernst Heinkel (9) · Robert Esnault-Pelterie (4) · Anton Flettner (3) · Alexander Baumann (2) · Orville Wright (2)
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Showing below up to 58 results in range #1 to #58.

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