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EVERARD RICHARD CALTHROP

Overview
  • Total Patents
    21
About

EVERARD RICHARD CALTHROP has a total of 21 patent applications. Its first patent ever was published in 1904. It filed its patents most often in France, United Kingdom and Germany. Its main competitors in its focus markets transport, civil engineering and machine tools are FRADET ERIC, GQ PARACHUTE COMP LTD and AVIOREX DREYFUS FRERES L.

Patent filings in countries

World map showing EVERARD RICHARD CALTHROPs patent filings in countries
# Country Total Patents
#1 France 10
#2 United Kingdom 10
#3 Germany 1

Patent filings per year

Chart showing EVERARD RICHARD CALTHROPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Calthrop Everard Richard 10
#2 Brewer Edward Godfrey 1

Latest patents

Publication Filing date Title
GB226885A Improvements relating to reinforced concrete structures
GB226886A Improvements in or relating to metal plates or shapes and structures composed thereof
GB204791A Improvements in machines for manufacturing compound veneer or plywood
GB194333A Improvements relating to devices for retaining and releasing ropes, cordage and the like
GB184499A Improvements relating to aerial craft
GB175780A Improvements relating to parachutes
GB164190A Improvements relating to parachutes
GB158304A Improvements relating to devices for connecting and disconnecting ropes cordage and the like
GB147993A Improvements relating to parachutes
GB165810A Improvements in or relating to parachute launching devices