Drilldown: Patents

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Patents > Family year: 1890 - 1899 & Number of text pages: 1

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Inventors:
Oscar Roeper (2) · Sophus Hartmann (2) · Rudolf Krocker (2) · Richard Czygan (2) · Max Nathan (2)
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Tech fields:
LTA (16) · propulsion (9) · propeller (7) · balloon (6) · frame (5) · None (4) · design (3) · control (3) · fabric (3) · safety (2) · projectile (2) · parachute (2) · hybrid (2) · military (2) · marine (2) · Subsystem (2) · kite (2) · navigation (2) · wings (2) · airship (2)
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