Patent FR-1910-417989.13504

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This is the first addition to Patent FR-1910-417989, which brevet was filed 1910-06-25.


Year filed 1910
Year granted 1911
Office FR
Patent number 13504
Inventors Édouard-Jean Bigourdan
Inventor country FR
Applicant person Édouard-Jean Bigourdan
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Biplan concentrique à mouvements contraires
English title Concentric biplane with contrary movements, actually a helicopter, featuring two counter-rotating blades, or sets of blades
Tech fields design, cables, propellers, helicopter
Filing date 1910/12/03
Full specification filed date
Application number 13504D
Grant date 1911/02/13
Granted? Yes
Publication date 1911/04/29
Supplementary to patent Patent FR-1910-417989
Related to aircraft? Yes
Serial number
Patent agent de Bongé
Assigned to
National tech categories FR 6.4
IPCs IPC B64C11/00
CPCs CPC B64C11/005
Family year 1910
First filing? No
Cites these patents
Citations from after 1930
Application ID 18723809
INPADOC family ID 5198345
Number of text pages 2
Number of diagram pages 1
Number of figures 2
Number of claims 1