Patent BE-1913-250406.252841

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This is a perfectionnement to Patent BE-1912-250406, which invention brevet was filed 1912-10-28.

« On emploie trois hélices, dont les centres forment un triangle, dont l’un des côtés est perpendiculaire à la direction de marche de l’appareil. »

“One uses three propellers, the centers of which form a triangle, one of the sides of which is perpendicular to the direction of travel of the device.”


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  • Inventor location: Brussels
  • Patent agent location: Brussels

Year filed 1913
Year granted
Office BE
Patent number 252841
Inventors Alfred E. Wunderlich
Inventor country BE
Applicant person Alfred E. Wunderlich
Applicant firm
Applicant type INDIV
Applicant is inventor? 1
Original title Autoplaneur Aéro à hélices sustentatrices
English title Autoglider “Aéra” with propellers of ascension
Tech fields gliders, hybrid, helicopter, design, sustentation, propellers, ascension
Filing date 1913-01-17
Full specification filed date
Application number
Grant date
Granted? 1
Publication date
Supplementary to patent Patent BE-1912-250406
Related to aircraft? 1
Serial number
Patent agent A. Wunderlich & Cie, Ingénieurs-Conseils
Assigned to
National tech categories BE K
Family year 1912
First filing?
Cites these patents
Citations from after 1930
Application ID
Number of text pages
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