Patent FR-1907-380581

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This patent makes priority date reference to a Belgian predecessor filed 1906-12-18.

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Patent family descending from Patent FR-1907-380581


Year filed 1907
Year granted 1907
Office FR
Patent number 380581
Inventors Émile Dupont
Inventor country BE
Applicant person Émile Dupont
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Hélicoptère ou aéroplane à deux hélices
English title Two-propeller helicopter or airplane
Tech fields Propellers, Propulsion, Airplane, Helicopter
Filing date 1907/08/06
Full specification filed date
Application number 380581D
Grant date 1907/10/11
Granted? Yes
Publication date 1907/12/12
Supplementary to patent Patent BE-1906-12-18 Émile Dupont
Related to aircraft? Yes
Serial number
Patent agent Ch. Faber
Assigned to
National tech categories FR 6.4
IPCs IPC B64C27/04, IPC B64C3/52
CPCs CPC B64C2700/6281, CPC B64C27/04
Family year 1906
First filing? No
Cites these patents
Citations from after 1930
Application ID 19200370
INPADOC family ID 5281734
Number of text pages 5
Number of diagram pages 3
Number of figures 31
Number of claims 8