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BROWN DAVID & SONS LTD

Overview
  • Total Patents
    182
About

BROWN DAVID & SONS LTD has a total of 182 patent applications. Its first patent ever was published in 1911. It filed its patents most often in United Kingdom, France and United States. Its main competitors in its focus markets machine tools, mechanical elements and measurement are ENGRENAGES ET MACHINES MAAG SA, MAAG ZAHNRAEDER & MASCHINEN A and SVENSKA KUGGHJULSFABRIKEN AB.

Patent filings in countries

World map showing BROWN DAVID & SONS LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 142
#2 France 11
#3 United States 9
#4 Switzerland 8
#5 Germany 8
#6 Austria 4

Patent filings per year

Chart showing BROWN DAVID & SONS LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Limited David Brown Sons Hudde 8
#2 Sykes Arthur 4
#3 Tuplin William Alfred 4
#4 Silas Welsby 3
#5 John Molesworth Reid 1
#6 Alfred Tuplin William 1
#7 Welsby Silas 1
#8 Brown Francis Edwin 1
#9 Allan Green 1
#10 James Goulder 1

Latest patents

Publication Filing date Title
GB827528A New or improved gear testing device
GB795260A An improvement in or relating to variable-speed gearboxes
GB804223A An improved epicyclic gear
GB774016A Improved means for preventing reverse rotation of a shaft
GB742910A New or improved apparatus for testing the accuracy of gear teeth
GB734223A An improvements in or relating to epicyclic gears
GB733184A An improvement in or relating to the production of shell-cores for use in the casting of metals
GB721841A An improvement in or relating to tools for cutting the teeth of gear wheels
GB706055A An improvement in or relating to the hobbing of toothed gear wheels
GB688110A An improvement in or relating to brakes for rotating members having self-regulated substantially constant braking torque
GB707561A An improvement in or relating to hobs for cutting the teeth of gear wheels
GB704153A Improvements relating to resilient gear wheels and other angularly movable members
GB701157A Improvements relating to shear pin assemblies
GB683835A New or improved means for effecting axial location of a rotating shaft
GB681838A An improvements in or relating to the transmission of motion with variable velocity ratio
GB681297A An improvement in or relating to transmission mechanism
GB686782A An improvement in or relating to variable speed gear boxes
GB688042A An improvement in or relating to brakes for rotating members having self-regulated substantially constant braking torque
GB688478A New or improved means for transmitting motion
GB672018A Improvements in or relating to machines for hobbing the teeth of gear wheels