Patent BE-1926-338559

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(In this case, the original document, itself, is the "source".)

Note: This patent, drawn from years beyond those on which we are focusing, was promoted to us, by an official at the AGR 2 - Cuvelier facility. It was alleged by him that this particular patent, for a helicopter equipped with two propellers of ascension or lift, was the inspiration of later helicopters used by the American military. We cannot verify this. A more modest claim is that Belgians, during the period on which we are focused, perhaps did more than their "share" of innovation work with propellers, both of lift and of propulsion. The gentleman promoting the patent mentioned 1930. We are not sure if this was a round figure. The patent was filed in 1926, and “vu pour être annexé à l’arrête ministériel du 31-Jan-1927”. (Handling this as a date granted is tentative, on our part.)

  • Inventor location: Forest-lez-Bruxelles, Belgium (The "Forest" spelling is Dutch, the name of a city. The French "lez", here, like "lès", means "near".)
Year filed 1926
Year granted 1927
Office BE
Patent number 338559
Inventors Nicolas Florine
Inventor country BE
Applicant person Nicolas Florine
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Hélicoptère
English title Helicopter with two lift propellers
Tech fields helicopter, propellers, ascension, lift, sustentation
Filing date March 3, 1926
Full specification filed date
Application number
Grant date January 31, 1927
Granted? Yes
Publication date
Supplementary to patent
Related to aircraft? Yes
Serial number
Patent agent
Assigned to
National tech categories BE K
Family year
First filing? No
Number of citations
Cited by
Application ID
Number of text pages
Number of diagram pages
Number of figures
Number of claims