Patent FR-1918-502433.21281

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Within the French system, this is a Certificat d'addition to Patent FR-1915-502433.

This addition also makes reference to the Italian priority date 1917-03-16. The French parent makes no similar Italian reference. We have an analogous situation with Patent GB-1918-130409, which is not called an outright addition, but which explicitly builds upon Patent GB-1915-14157. There also, the later patent, filed by Federico Caproni within one national system, does make reference to an Italian patent, while the earlier patent filed, within said system, does not. However this patent family likely begins with Patent IT-1915-150227 filed by Caproni in July 1915.


Patent family descending from Patent IT-1915-150227

Year filed 1918
Year granted 1918
Office FR
Patent number 21281
Inventors Federico Caproni
Inventor country IT
Applicant person Federico Caproni
Applicant firm
Applicant type INDIV
Applicant is inventor? Yes
Original title Perfectionnements aux machines volantes
English title Improvements in Flying Machines
Tech fields airplane, landing, chassis, biplane
Filing date 1918/05/22
Full specification filed date
Application number 21281D
Grant date 1920/08/05
Granted? Yes
Publication date
Supplementary to patent Patent FR-1915-502433, Patent IT-1917-03-16 Federico Caproni, Patent IT-1915-150227
Related to aircraft? Yes
Serial number
Patent agent M. Zerolo
Assigned to
National tech categories
IPCs IPC B64C25/00
CPCs CPC B64C25/64, CPC B64C25/34 B64F2700/6226
Family year 1915
First filing? No
Cites these patents
Citations from after 1930
Application ID 18732333
INPADOC family ID 10243770
Number of text pages 2
Number of diagram pages 1
Number of figures 6
Number of claims 3