Patent FR-1920-498979

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Supplementary to a British patent of 1 nov 1916.


Year filed 1917
Year granted 1920
Office FR
Patent number 498979
Inventors Thomas Sopwith
Inventor country GB
Applicant person Thomas Sopwith
Applicant firm Sopwith Aviation Company
Applicant type COMPANY+INDIV
Applicant is inventor? No
Original title Perfectionnements dans les freins pour aéroplanes
English title Improvements in the brakes for airplanes
Tech fields brakes, Braking
Filing date April 27, 1917
Full specification filed date
Application number 498979D
Grant date January 28, 1920
Granted? Yes
Publication date
Supplementary to patent
Related to aircraft? Yes
Serial number
Patent agent
Assigned to
National tech categories FR 6.4
IPCs IPC B65H9/16, IPC B64C9/32
CPCs CPC B65H9/166, CPC B64C9/32
Family year 1917
First filing? No
Cites these patents
Citations from after 1930
Application ID 19316057
INPADOC family ID 5379020
Number of text pages
Number of diagram pages
Number of figures
Number of claims