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Patents > Grant date: 1919 & National tech categories : AT 77d or USPC 114/77R

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airplane (17) · frame (9) · LTA (7) · design (7) · construction (6) · airship (5) · wings (5) · Propellers (5) · biplane (5) · military (4) · gas (4) · HTA (3) · aerodynamics (3)
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Showing below up to 35 results in range #1 to #35.

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