Drilldown: Patents

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Patents > Grant date: August 1919 & First filing: Yes & Number of text pages: 2-4

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None (6) · Airplane (6) · frame (5) · structure (4) · construction (3) · stability (3) · spars (3) · control (3) · wings (3) · metal (2) · Subsystem (2) · design (2) · airfoil (2) · LTA (2) · propellers (2)
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