Patent GB-1909-1443

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The early version, later superseded, says: One wing beam is fixed and the other movable. The moving one can rotate so that it is high on one side and low on the other.

  • Inventor location: Calle de Durango 92, City of Mexico, in the Republic of Mexico
  • Dufwa's a Physician


Year filed 1909
Year granted 1910
Office GB
Patent number 1443
Inventors Frederick William Dufwa
Inventor country MX
Applicant person Frederick William Dufwa
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Improvements in flying machines
English title Wing beam construction on flying machines
Tech fields wings, construction, control
Filing date July 13, 1909
Full specification filed date
Application number 191001443D
Grant date June 16, 1910
Granted? Yes
Publication date
Supplementary to patent
Related to aircraft? Yes
Serial number
Patent agent Haseltine, Lake & Co.
Assigned to
National tech categories
IPCs IPC B64C39/00
CPCs CPC B64C39/00, CPC B64C2700/6295
Family year 1909
First filing? Yes
Cites these patents
Citations from after 1930
Application ID 23593818
INPADOC family ID 11087417
Number of text pages 3
Number of diagram pages 1
Number of figures 3
Number of claims 3