Patent GB-1912-13882

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Form of helicopter, possibly with large overlapping blades. This is explicitly a patent of addition, that is a supplementary or child patent.

  • Inventor location: Charente-Inférieure, France

Patent family descending from Patent GB-1911-14926


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? 1
Original title Improvements relating to Helicopter Flying Machines
English title Improvements relating to Helicopter Flying Machines
Tech fields helicopter
Filing date 1912-06-13
Full specification filed date
Application number 191213882D
Grant date 1913-02-06
Granted? 1
Publication date
Supplementary to patent Patent GB-1911-14926
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 1911
First filing? 0
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