Patent DE-1911-285227

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Rotatable wings which swing out or in from the fuselage.

  • Diagram much like his other patents

Inventor location: Wilmington, North Carolina


Year filed 1911
Year granted 1915
Office DE
Patent number 285227
Inventors David Palmgren
Inventor country US
Applicant person David Palmgren
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Flugmaschine mit an der Tragfläche mittels Scharniere drehbar angeordneten Flügeln
English title Flying machine with rotatable airfoils to the wings by hinges
Tech fields airfoil
Filing date January 19, 1911
Full specification filed date
Application number
Grant date June 24, 1915
Granted? Yes
Publication date
Supplementary to patent
Related to aircraft? Yes
Serial number
Patent agent
Assigned to
National tech categories Klasse 77h Gruppe 5
IPCs IPC B64C3/42
CPCs CPC B64C3/42
Family year 1911
First filing? No
Number of citations
Cited by
Application ID
Number of text pages 2
Number of diagram pages 1
Number of figures 2
Number of claims 1