Drilldown: Patents

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Patents > Inventor country: DE & Grant date: 1909 & Number of claims: 3-4

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LTA (6) · airship (5) · Design (4) · Infrastructure (3) · Hangars (3) · frame (3) · stability (3) · method (2) · navigation (2) · gas (2) · projectile (2) · Propellers (2) · hydrogen (2) · balloon (2) · safety (2) · airplane (2)
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