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JOHN DEWRANCE

Overview
  • Total Patents
    50
About

JOHN DEWRANCE has a total of 50 patent applications. Its first patent ever was published in 1906. It filed its patents most often in United Kingdom, France and United States. Its main competitors in its focus markets mechanical elements, measurement and control are GRISWOLD CONTROLS LLC, HATTERSLEY NEWMAN HENDER and COCARD JULES SA.

Patent filings in countries

World map showing JOHN DEWRANCEs patent filings in countries
# Country Total Patents
#1 United Kingdom 41
#2 France 6
#3 United States 3

Patent filings per year

Chart showing JOHN DEWRANCEs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Dewrance John 6
#2 John Dewrance 2
#3 Edward Church Bonneval 1

Latest patents

Publication Filing date Title
GB480301A Improvements in or relating to high and low level alarms for boilers and like apparatus
GB455139A Improvements in or relating to gaseous pressure systems and valves for use in connection therewith
GB451280A Improvements in or relating to fluid pressure gauges
GB459681A Improvements in or relating to forged or cast water gauges of the sleeve-packed type
GB460042A Improvements in or relating to valves for fluids or semi-fluid substances
GB449827A Improvements in or relating to fluid pressure gauges
GB447502A Improvements in or relating to ball swivel joints for use with steam and other fluid conduits
GB447830A Improvements in or relating to fluid-pressure operated stop valves, bye-pass valves and means for controlling such valves
GB423418A Improvements in steam traps of the inverted bucket type
GB419200A Improvements in or relating to flexible diaphragms for valves, pumps and the like
GB431420A Improvements in or relating to valves
GB413249A Improvements in steam traps of the inverted bucket type
GB429196A Improvements in or relating to valves
GB424013A Improvements in or relating to water level indicators
GB423047A Improvements in or relating to grips or handles for cocks, valves and other articlesrequiring an insulated handle
GB410155A Improvements in or relating to machines for making sand cores and moulds
GB397988A Improvements in or relating to water-level indicators
GB375193A Improvements in or relating to steam, hydraulic and like valves
GB371541A Improvements in fluid-pressure operated stop valves
GB347476A Improvements in or relating to piston valves