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Patents > National tech categories: FR 6.4 & IPCs: None & Number of figures: 4-20

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None (6)
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airplane (17) · stability (11) · None (9) · flapping (6) · design (6) · wings (6) · frame (5) · propulsion (5) · whole (5) · navigation (4) · ornithopter (4) · Construction (4) · Propellers (3) · heavier-than-air (3) · automatic stability (3) · wing (3) · Lift (3)
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None (7)
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Showing below up to 47 results in range #1 to #47.

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