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HELE-SHAW HENRY SELBY

Overview
  • Total Patents
    91
About

HELE-SHAW HENRY SELBY has a total of 91 patent applications. Its first patent ever was published in 1901. It filed its patents most often in United Kingdom, Canada and Austria. Its main competitors in its focus markets engines, pumps and turbines, mechanical elements and measurement are NUTRON CORP, SAMPO HYDRAULICS OY and GENIUS VELO LTD.

Patent filings in countries

World map showing HELE-SHAW HENRY SELBYs patent filings in countries
# Country Total Patents
#1 United Kingdom 43
#2 Canada 18
#3 Austria 10
#4 Denmark 10
#5 United States 10

Patent filings per year

Chart showing HELE-SHAW HENRY SELBYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hele-Shaw Henry Selby 91
#2 Martineau Francis Leigh 29
#3 Beacham Thomas Edward 13
#4 Tribe Ernest 4
#5 Helliwell Robert Best 4
#6 Rickwood Henry John 2
#7 Leigh-Martineau Francis 1
#8 Bes Helliwell Robert 1
#9 Mills Edward Cecil 1
#10 Gilder William Louis 1

Latest patents

Publication Filing date Title
GB135799A Improvements in Hydraulic Clutches or Couplers.
GB126655A Improvements in and connected with Pipe and Cylinder Flange Joints.
US1250170A Rotary pump or motor.
GB191502702A Improvements in Rotary Pumps and Motors.
GB191410416A Improvements in Hydraulic Apparatus.
GB191329347A Improvements in and connected with the Piston and Cylinder Fittings of Weighing and Recording Apparatus.
GB191325706A Improvements in and connected with Hydraulic Power Transmission Apparatus.
GB191323117A Improvements in Means for Measuring, Indicating or Recording Force at a Distance.
GB191313238A Improvements in Hydraulic Weighing Machines.
GB191308726A Improvements connected with Pressure Intensifying Apparatus for Hydraulic Presses and Press Tools.
GB191308149A An Improved Machine for Measuring and Recording Variable Force.
CA153933A Hydraulic apparatus
GB191228306A An Improved Weighing and Force Measuring Machine.
GB191228062A Improvements in Governors.
GB191221166A An Improved Apparatus for Disinfecting and Flushing Water Closets.
GB191216145A Improvements in the Control Mechanism of Variable Stroke Pumps.
GB191315944A Improvements in Hydraulic Motors.
GB191213993A Improvements in Hydraulic Motors.
CA151191A Hydraulic transmission apparatus
GB191200336A Improvements in Hydraulic Apparatus.