Patent GB-1912-13882

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This is explicitly a patent of addition, within the British system. It is an addition to Patent GB-1911-14926, which parent patent was filed 1916-06-25. The British parent patent makes priority date reference to Patent FR-1910-417989. There is likely a French addition analogous to this British.

It is a form of helicopter, possibly with large overlapping blades.


Year filed 1912
Year granted 1913
Office GB
Patent number 13882
Inventors Édouard-Jean Bigourdan
Inventor country FR
Applicant person Édouard-Jean Bigourdan
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Improvements relating to Helicopter Flying Machines
English title Improvements relating to Helicopter Flying Machines
Tech fields helicopter, HTA
Filing date 1912/06/13
Full specification filed date
Application number 191213882D
Grant date 1913/02/06
Granted? Yes
Publication date
Supplementary to patent Patent GB-1911-14926, Patent FR-1910-417989
Related to aircraft? 1
Serial number
Patent agent Mathys & Co.
Assigned to
National tech categories
IPCs IPC B64C11/00
CPCs CPC B64C11/007, CPC B64C11/005
Family year 1910
First filing? No
Cites these patents
Citations from after 1930
Application ID 23635099
INPADOC family ID 11108916
Number of text pages 2
Number of diagram pages 1
Number of figures 3
Number of claims 3