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Patents > National tech categories : AU 90.3 or DE 77h.6 & Number of claims: 5-20

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airplane (14) · frame (12) · propeller (10) · propulsion (7) · whole (7) · stability (6) · heavier-than-air (5) · safety (4) · landing (4) · piloting (3) · marine (3) · hybrid (3) · helicopter (3) · airfoil (3)
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Showing below up to 27 results in range #1 to #27.

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