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JOHN ASHWORTH CRABTREE

Overview
  • Total Patents
    232
About

JOHN ASHWORTH CRABTREE has a total of 232 patent applications. Its first patent ever was published in 1919. It filed its patents most often in United Kingdom, Germany and Ireland. Its main competitors in its focus markets electrical machinery and energy, machines and materials and metallurgy are ARNOULD ETS, BUSCH JAEGER DUERENER METALL and EGA ELECTRIC LTD.

Patent filings in countries

World map showing JOHN ASHWORTH CRABTREEs patent filings in countries
# Country Total Patents
#1 United Kingdom 219
#2 Germany 6
#3 Ireland 6
#4 France 1

Patent filings per year

Chart showing JOHN ASHWORTH CRABTREEs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Crabtree John Ashworth 1

Latest patents

Publication Filing date Title
GB917041A Improvements in and connected with governors for water turbines
GB768458A Means for regulating the water-level in steam boilers
GB467203A Improvements in, or relating to, motor-protective and other automatic switches or circuit-breakers
GB465063A Improvements in, or relating to, contact members for electrical switches of the smaller kind
GB454985A Improvements in, or relating to, electric switches of the tumbler type
GB456379A Improvements in, or relating to, electric circuit-breakers
GB458826A Improvements in, or relating to, overload and other release devices for use in electric circuit-breakers and the like
GB457130A Improvements in or relating to electrical couplings of the plug-pin type
GB456665A Improvements in, or relating to, electric switches, bell-pushes, socket couplings, and the like
GB451708A Improvements in, or relating to, electrical appliances such as coupling-sockets, switches, and fuses
GB452151A Improvements in, or relating to, electrical switches of the springtoggle type
GB448509A Improvements in, or relating to, electric fuse-holders
GB449472A Improvements relating to the mounting of switches, coupling sockets and similar electrical units
GB433368A Improvements in, or relating to, the mounting of electric switches, coupling-socketsand similar units in wall-boxes and the like
IE13411L Snap-action electrical switches
GB444211A Improvements in electric lamp-holders
GB443607A Improvements in, or relating to, electrical ceiling roses
GB447323A Improvements in or relating to electrical cable-connectors
GB446090A Improvements in or relating to plug-and-socket and other couplings, switches, fuses and similar electrical appliances
GB444114A Improvements in or relating to electrical appliances such as coupling-sockets, switches and fuses