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Patents > Inventor country: None & CPCs : CPC G01R22/02 or None

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None (1712) ·   (4) · Patent FR-1880-139386 (3) · Patent BE-1913-253298 (2) · Patent US-1913-04-21 George Raymond Lawrence (2) · Patent FR-1900-299924 (2) · Patent FR-1881-143264 (2)
Related to aircraft:
Patent agent:
None (1617) · Desnos (12) · Blétry aîné (10) · Armengaud jeune (9) · Chassevent (7) · Dieuaide (6) · Société Marillier et Robelet (6) · Dumas (4) · Société Louis Gudman et Cie (4) · Casalonga (4) · Thirion (4) · Armengaud aîné (4) · Duvinage (3) · Caron (3) · Bardin (3) · Fayollet (3) · Société Matray frères (3)
National tech categories:
None (1321) · FR 6.3 (170) · GB 4 propel & steer (23) · GB 4 with buoyant (19) · GB 4 (15) · USPC 244/139 (14) · BE K (14) · GB 4 without buoyant (12) · USPC 244/147 (12) · USPC 244/142 (11) · USPC 244/153R (9) · FR 5 (8) · USPC 244/53A (7) · USPC 244/149 (7) · FR 6 (6) · GB 4 aërostats (6) · HU V/h (5) · DE 77 (5) · MX F. III (5)
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