Patent FR-1915-502520

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Original diagram page of Patent FR-1915-502520

This has the basic lay-out of an airplane, but with ascension-oriented propellers on the wings.


Patent family descending from Patent FR-1915-502520

Year filed 1915
Year granted 1920
Office FR
Patent number 502520
Inventors Alexis Beurrier, Edmond Bigourdan, Louis Lacoin
Inventor country FR
Applicant person Alexis Beurrier, Edmond Bigourdan, Louis Lacoin
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Avion à voilure tournante
English title Improvements in Flying Machines with Revolving Wings
Tech fields heavier-than-air, helicopter, hybrid, ascension, descent, propellers, airplane, braking
Filing date 1915/11/06
Full specification filed date
Application number 502520D
Grant date 1920/02/24
Granted? Yes
Publication date 1920/05/18
Supplementary to patent
Related to aircraft? Yes
Serial number
Patent agent J. Fayollet
Assigned to
National tech categories FR 6.4
IPCs IPC B64C27/04
CPCs CPC B64C27/04, CPC B64C2700/6281
Family year 1915
First filing? Yes
Cites these patents
Citations from after 1930
Application ID 19319502
INPADOC family ID 548139
Number of text pages 3
Number of diagram pages 2
Number of figures 7
Number of claims 1