Drilldown: Patents

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Patents > Year filed: 1900 - 1909 & Inventor country : DE or HU or NL & Applicant type: None

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Office:
Inventors:
None (9) · Alfred Maul (3) · Emil Lehmann (2)
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Tech fields:
LTA (19) · balloon (10) · propulsion (8) · navigation (7) · propeller (7) · None (7) · frame (6) · stability (6) · Airplane (6) · whole (5) · safety (4) · propellers (4) · pressure (4) · car (4) · rocket (3) · photography (3) · gas (3) · kite (3)
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