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WILLIAM DOUGLAS MARCHANT

Overview
  • Total Patents
    22
About

WILLIAM DOUGLAS MARCHANT has a total of 22 patent applications. Its first patent ever was published in 1931. It filed its patents most often in United Kingdom and Germany. Its main competitors in its focus markets engines, pumps and turbines, transport and environmental technology are HEDSTROM CARL O, DAVEY PAXMAN & COMPANY LIMITED and YAMAHA MOTOR CO LTD.

Patent filings in countries

World map showing WILLIAM DOUGLAS MARCHANTs patent filings in countries
# Country Total Patents
#1 United Kingdom 20
#2 Germany 2

Patent filings per year

Chart showing WILLIAM DOUGLAS MARCHANTs patent filings per year from 1900 to 2020

Latest patents

Publication Filing date Title
GB703393A An improved means for controlling the supply of fuel to internal combustion engines
GB601480A Improvements in or relating to combustion chambers of internal combustion engines
GB556205A Improved means for controlling the supply of fuel to internal combustion engines
GB540387A Improvements in or relating to stands for motor-bicycles and the like
GB540386A Improvements in or relating to wheel mountings for bicycles, motor-bicycles and the like
GB540389A Improvements in or relating to the front forks of motor-bicycles and like vehicles
GB540154A Improvements in or relating to the mounting of the rear wheels of motor-bicycles andsimilar vehicles
GB540388A Improvements in or relating to the mounting of mudguards of motor bicycles, bicyclesand similar vehicles
GB534077A Improvements in or relating to combustion chambers of internal combustion engines
GB530310A Improvements in change speed gear
GB525120A Improvements in or relating to the driving of the cam shafts of internal combustion engines
GB523698A Improvements in or relating to shock absorbers or vibration dampers
GB523700A Improvements in or relating to spring forks for motor-bicycles or the like
GB523699A Improvements in or relating to seats for vehicles
GB523701A Improvements in or relating to chain cases, particularly for cycles
GB508351A Improvements in or relating to the inlet and exhaust passages of the cylinders of internal combustion engines
GB454477A Valve closing spring for internal combustion engines
GB397493A Improvements in injection apparatus for fuel for internal combustion engines
GB396463A Improvements in four-stroke-cycle internal combustion engines
GB384084A Improvements in or relating to combustion chambers of internal-combustion engines