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Patents > CPCs: CPC B64C23/005 & Number of text pages: 3-4 & Number of figures: 4-5

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Harvey Mcmaster Lloyd (2) · Nelson Leslie Hyatt (2)
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airplane (11) · None (11) · helicopter (8) · propulsion (7) · frame (5) · stability (4) · safety (4) · propellers (4) · wings (4) · parachutes (3) · descent (3) · design (3) · hybrid (3) · ascension (3) · navigation (3)
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