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Patents > Year filed: 1911 & Office : DE or RU & Inventor country: DE

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LTA (6) · frame (6) · airplane (5) · wings (4) · Tragfläche (3) · design (3) · propulsion (3) · flapping (3) · motor (3) · airship (2) · wing (2) · car (2) · whole (2) · subsystem (2) · piloting (2)
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