Patent FR-1919-491223.20842

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This is a cert d'addition.


Year filed 1916
Year granted 1919
Office FR
Patent number 20842
Inventors Jean-Marie-Stephen Graf
Inventor country FR
Applicant person Jean-Marie-Stephen Graf
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Hydroaéroplane incapotable
English title hydroplane
Tech fields hydroplane
Filing date December 13, 1916
Full specification filed date
Application number 20842D
Grant date July 22, 1919
Granted? Yes
Publication date
Supplementary to patent Patent FR-1919-491223
Related to aircraft? Yes
Serial number
Patent agent
Assigned to
National tech categories FR 6.4
IPCs IPC B64C17/00
CPCs CPC B64C17/00, CPC B64C2700/6212
Family year 1915
First filing? No
Cites these patents
Citations from after 1930
Application ID 18731905
INPADOC family ID 5202823
Number of text pages 2
Number of diagram pages
Number of figures
Number of claims 2