Drilldown: Patents

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Patents > National tech categories : DE 77h.6 or DK 77 & Number of claims: 3-40

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None (12) · Alfred John Macy (4) · Hellmuth Hirth (3) · Richard Wilcke (2) · Albert Graff (2)
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propeller (15) · Airplane (13) · Design (11) · frame (10) · propulsion (10) · stability (9) · navigation (8) · propellers (7) · Wings (6) · LTA (6) · subsystem (6) · Construction (4) · gas (3) · Lift (3) · compartments (3) · balloon (3) · wheels (3)
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