Drilldown: Patents

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Patents > Office: US & Grant date: 1915 & Number of claims: 5-8

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None (2) · Josef Schröder (2)
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None (9) · airplane (7) · stability (5) · frame (4) · construction (3) · propeller (3) · propulsion (3) · LTA (3) · helicopter (2) · design (2) · automatic stability (2) · structure (2) · wings (2)
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