Drilldown: Patents

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Patents > Office : DE or UN & National tech categories : DE 77h or DE 77h.6 & Number of figures: None

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propeller (10) · propulsion (8) · subsystem (7) · frame (6) · LTA (5) · stability (5) · parachute (4) · dirigible (4) · safety (3) · kite (3) · whole (3) · navigation (3) · design (2) · helicopter (2) · car (2) · fun (2) · gas (2) · airfoil (2)
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Showing below up to 36 results in range #1 to #36.

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