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, Édouard-Jean 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 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? Yes
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