Patent FR-1912-444288

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This is a foreign filing of Patent US-1912-1033662

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Year filed 1912
Year granted 1912
Office FR
Patent number 444288
Inventors David Henderson Blake
Inventor country US
Applicant person David Henderson Blake
Applicant firm
Applicant type
Applicant is inventor? Yes
Original title Perfectionnements dans propulseurs à hélice
English title Improvements to propellers
Tech fields propellers
Filing date May 25, 1912
Full specification filed date
Application number FR444288  (A)
Grant date August 3, 1912
Granted? Yes
Publication date October 14, 1912
Supplementary to patent Patent US-1912-1033662
Related to aircraft? Yes
Serial number
Patent agent L. Chassevent
Assigned to
National tech categories FR 6.2
IPCs IPC B63H1/26
CPCs CPC B63H1/26
Family year 1912
First filing? No
Cites these patents
Citations from after 1930
Application ID
INPADOC family ID
Number of text pages 2
Number of diagram pages 1
Number of figures 5
Number of claims 3