Patent FR-1916-502520.22245

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This is an addition to Patent FR-1915-502520, which brevet was filed 1915-11-06.

Patent family descending from Patent FR-1915-502520


Year filed 1916
Year granted 1920
Office FR
Patent number 22245
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? 1
Original title Avion à voilure tournante
English title Rotary wing aircraft
Tech fields heavier-than-air, helicopter, hybrid, ascension, descent, propellers, airplane
Filing date 1916/11/02
Full specification filed date
Application number 22245D
Grant date 1920/12/21
Granted? 1
Publication date 1921/05/24
Supplementary to patent Patent FR-1915-502520
Related to aircraft? 1
Serial number
Patent agent J. Fayollet
Assigned to
National tech categories FR 6.4
IPCs IPC B64C27/32
CPCs CPC B64C2700/6283, CPC B64C27/32
Family year 1915
First filing? No
Cites these patents
Citations from after 1930
Application ID 18733286
INPADOC family ID 10244544
Number of text pages 1
Number of diagram pages 0
Number of figures 0
Number of claims 1