Patent FR-1909-398825

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At first glance: Pair of aerial propellers on a biplane, perhaps with control of their directions.


Patent family descending from Patent FR-1909-398825

Year filed 1909
Year granted 1909
Office FR
Patent number 398825
Inventors Nicolas Hornstein
Inventor country FR
Applicant person Nicolas Hornstein
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Perfectionnements apportés aux aéroplanes
English title Improvements to aeroplanes
Tech fields propellers, airplane, control, design
Filing date 1909/01/26
Full specification filed date
Application number 398825D
Grant date 1909/04/03
Granted? Yes
Publication date 1909/06/15
Supplementary to patent
Related to aircraft? Yes
Serial number
Patent agent Charles Assi
Assigned to
National tech categories FR 6.4
IPCs IPC B64C17/00
CPCs CPC B64C17/00, CPC B64C2700/6214
Family year 1909
First filing? Yes
Cites these patents
Citations from after 1930
Application ID 19218194
INPADOC family ID 5195486
Number of text pages 2
Number of diagram pages 1
Number of figures 4
Number of claims 1