Drilldown: Patents

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Patents > Office : DE or MX & Supplementary to patent : DE79446 or Patent NO-1915-12-15 Carl Alfred Johansson or Patent SE-1906-23283 or None & National tech categories : DE 77 or DE 77h.10 & Number of figures: None

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LTA (13) · propulsion (8) · balloon (5) · propeller (5) · navigation (4) · sail (3) · ornithopter (2) · pressure (2) · gas (2) · flapping (2) · None (2) · compressed air (2) · suspension (2) · ascension (2)
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