Patent FR-1909-398825

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

Sources

• Original patent document and bibliography entry on espacenet
• Inventor location: département Seine, France

Patent family descending from Patent FR-1909-398825

• Patent FR-1909-398825 (English title: Improvements to aeroplanes, National tech categories: FR 6.4)
• Patent FR-1909-398825.10633 (English title: Improvements brought to the specifics of airplane propeller control, Supplementary to patent: Patent FR-1909-398825, National tech categories: FR 6.4)
• Patent FR-1909-398825.10866 (English title: Improvements brought to airplanes, or the launching thereof, Supplementary to patent: Patent FR-1909-398825, National tech categories: FR 6.4)
• Patent FR-1909-398825.11173 (English title: Improvements brought to airplanes, Supplementary to patent: Patent FR-1909-398825, National tech categories: FR 6.4)

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