Patent FR-1912-439296

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Year filed 1911
Year granted 1912
Office FR
Patent number 439296
Inventors Constant Crouzat
Inventor country FR
Applicant person Constant Crouzat
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Propulseur orthoptère
English title Helicopter propeller
Tech fields Propulsion, helicopter, orthopter
Filing date April 3, 1911
Full specification filed date
Application number 439296D
Grant date June 10, 1912
Granted? Yes
Publication date
Supplementary to patent
Related to aircraft? 1
Serial number
Patent agent
Assigned to
National tech categories FR 6.4
IPCs IPC B64C11/00
CPCs CPC B64C11/006
Family year 1911
First filing? No
Cites these patents
Citations from after 1930
Application ID 19257777
INPADOC family ID 5328632
Number of text pages
Number of diagram pages
Number of figures
Number of claims