Drilldown: Patents

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Patents > Inventor country: DE & Number of text pages: 3-6 & Number of diagram pages: 3-5

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propulsion (11) · stability (8) · airplane (7) · control (6) · LTA (6) · airship (4) · hybrid (4) · frame (4) · subsystem (4) · navigation (3) · Infrastructure (3) · aerodynamics (3) · Hangars (3) · design (3) · None (3) · sustentation (3) · balloon (3) · whole (3)
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