Drilldown: Patents

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Patents > Office : FR or GB or MX & Granted: Yes & Supplementary to patent : Patent BE-1909-214032 or Patent HU-1901-24148 or Patent NO-1915-12-15 Carl Alfred Johansson or None & Patent agent: None & CPCs : CPC B64C3/385 or None

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None (1773)
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None (1484) · FR 6.3 (121) · FR 5 (64) · FR 6.4 (33) · GB 4 propel & steer (31) · MX F. III (31) · GB 4 (22) · GB 4 with buoyant (22) · GB 4 without buoyant (20) · FR 6 (10) · GB 4 aërostats (8) · GB 4 framework (6) · GB 4 aëroplanes (6) · MX F. II (6) · GB 4 parachutes (5) · GB 4 motors (5) · GB 122 aero steam engines (5) · GB 123 aero steam generators (4) · FR 10.1 (4)
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