Drilldown: Patents

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Patents > Grant date: 1919 & Patent agent : None or Weismann et Marx

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construction (8) · metal (8) · frame (8) · None (3) · structure (3) · airplane (3) · spars (3) · design (3) · stability (2) · propulsion (2) · propellers (2) · military (2) · landing (2) · wings (2) · control (2)
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Showing below up to 29 results in range #1 to #29.

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