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Patents > Office : CH or GB & Supplementary to patent : Patent NO-1915-12-15 Carl Alfred Johansson or Patent US-1913-04-21 George Raymond Lawrence or None & CPCs : CPC B64C11/006 or None

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Office: (Click arrow to add another value)
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Application number:
None (1573)
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Supplementary to patent: (Click arrow to add another value)
Patent agent:
None (1321) · Haseltine, Lake & Co. (14) · A. Ritter (12) · None (11) · E. Blum & Co. (10) · Boult, Wade & Tennant (10) · Marks & Clerk (9) · Brierley & Howard (7) · Herbert Haddan & Co. (6) · Wilhelm Reinhard (6) · W. P. Thompson & Co. (6) · Boult, Wade & Kilburn (6) · J. Owden O'Brien (5) · Phillips & Leigh (5) · E. Imer-Schneider (5)
National tech categories:
None (1433) · GB 4 propel & steer (51) · GB 4 without buoyant (31) · GB 4 with buoyant (31) · CH 129b (30) · GB 4 (23) · GB 4 aëroplanes (15) · CH 115 (11) · GB 4 aërostats (10) · GB 4 framework (10) · GB 4 motors (7) · CH 129c (6) · GB 122 aero steam engines (6) · GB 4 parachutes (5) · GB 4 cars and cabins (5) · GB 4 aërial railways (4) · GB 123 aero steam generators (4) · GB 4 military (4)
CPCs: (Click arrow to add another value)
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Citations from after 1930:
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