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ROBERT PILE DOXFORD

Overview
  • Total Patents
    45
About

ROBERT PILE DOXFORD has a total of 45 patent applications. Its first patent ever was published in 1918. It filed its patents most often in Germany, United Kingdom and United States. Its main competitors in its focus markets engines, pumps and turbines, mechanical elements and environmental technology are FUSION MOTEURS, GEORGE STEPHEN KAMMER and EUGENE HENRI TARTRAIS.

Patent filings in countries

World map showing ROBERT PILE DOXFORDs patent filings in countries
# Country Total Patents
#1 Germany 11
#2 United Kingdom 11
#3 United States 10
#4 France 9
#5 Canada 3
#6 Switzerland 1

Patent filings per year

Chart showing ROBERT PILE DOXFORDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Keller Karl Otto 12
#2 Otto Keller Karl 11
#3 Doxford Robert Pile 9
#4 Pile Doxford Robert 1

Latest patents

Publication Filing date Title
GB272615A Improvements relating to the retarding or stopping of internalcombustion engines
US1684629A Piston for internal-combustion engines
GB266061A Improvements in or relating to pistons for internal-combustion engines
GB264218A Improvements in packing for pistons, stuffing-boxes and the like
US1515391A Internal-combustion engine
DE424045C Internal combustion engine with airless injection
DE407452C Internal combustion engine with compressed air inlet valve
US1608322A Internal-combustion engine
GB218000A Improvements in or relating to engines operated by liquid-fuel
GB202750A Improvements in or relating to compressed-air inlet-valves for internal-combustion engines
US1464268A Engine operated by liquid fuel and method of working the same
DE397837C Method for operating internal combustion engines
GB194838A Improvements in or relating to engines operated by liquid-fuel and in methods of working the same
US1385005A Reciprocating pump and the like
US1393626A Internal-combustion engine
GB175766A Improvements in or relating to reciprocating pumps
GB170771A Improvements in or relating to the cylinders of internal-combustion engines
US1401911A Fuel-spraying nozzle for internal-combustion engines
US1482796A Engine
GB163799A Improvements in or relating to fuel-spraying nozzles for internal-combustion engines