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ROOTS JAMES DENNIS

Overview
  • Total Patents
    64
About

ROOTS JAMES DENNIS has a total of 64 patent applications. Its first patent ever was published in 1901. It filed its patents most often in United Kingdom, United States and Canada. Its main competitors in its focus markets engines, pumps and turbines, environmental technology and mechanical elements are MELCHIOR JEAN F, SCHAICH JOSEF and CLOUDSLEY JOHN LESLIE.

Patent filings in countries

World map showing ROOTS JAMES DENNISs patent filings in countries
# Country Total Patents
#1 United Kingdom 53
#2 United States 7
#3 Canada 2
#4 Austria 1
#5 Switzerland 1

Patent filings per year

Chart showing ROOTS JAMES DENNISs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Roots James Dennis 63
#2 Head Albert Alfred 1
#3 Heywood Charles Frederic 1
#4 Venables Cuthbert Edward 1
#5 James Dennis Roots 1

Latest patents

Publication Filing date Title
GB127801A Straining or Filtering Device for Liquids.
US1296853A Carbureter.
GB131151A Improvements in Revolving Cylinder Internal Combustion Engines.
GB116914A A Flying Machine.
GB108524A Improvements in or relating to Ships or Vessels especially Vessels of War.
GB191515306A Improvements in and connected with the Bearings of Internal Combustion Engines.
US1280852A Means for controlling and increasing the speed and power of internal-combustion engines.
GB191421614A Improvements in Means for Controlling and Increasing the Speed and Power of Internal Combustion Engines for Propelling Vehicles and the like.
GB191314836A Improved Construction of Propeller for Gases or Liquids, applicable also as a Pump or as a Turbine Motor.
GB191312171A Improvements in Internal Combustion Engines.
US1186836A Valve for internal-combustion engines.
GB191306477A Improvements in or relating to the Feeding of Fuel in Internal Combustion Engines.
GB191229968A A New or Improved Fluid Pressure Engine.
GB191224817A A New or Improved Fluid Pressure Engine.
GB191223945A A New or Improved Variable Speed Transmission Gear.
CA149637A Valve for internal combustion engines
GB191212601A Improvements in Vaporisers or Gas Producers.
GB191211185A Improved Valve for Internal Combustion Engines.
GB191211030A Improvements in Internal Combustion Engines.
GB191205154A Improved Arrangement of Constructional Steel or Ironwork or Reinforcement for Concrete and the like.