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HOBBS TRANSMISSION LTD

Overview
  • Total Patents
    136
About

HOBBS TRANSMISSION LTD has a total of 136 patent applications. Its first patent ever was published in 1943. It filed its patents most often in United Kingdom, United States and Canada. Its main competitors in its focus markets mechanical elements, machines and transport are LUK LEAMINGTON LTD, PUNCH POWERTRAIN NV and MORGAN GEORGE H.

Patent filings in countries

World map showing HOBBS TRANSMISSION LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 39
#2 United States 35
#3 Canada 28
#4 France 22
#5 Germany 10
#6 Belgium 2

Patent filings per year

Chart showing HOBBS TRANSMISSION LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hobbs Howard Frederick 52
#2 Frederick Hobbs Howard 28
#3 Hobbs Howard F 19
#4 Arthur Thompson Joseph 3
#5 Thompson Joseph Arthur 3
#6 Fesser Erich 2
#7 Ball Charles James Prior 1
#8 Allen Anthony R H 1
#9 Allen Anthony Rex Hepburn 1
#10 Thornton Kenneth 1

Latest patents

Publication Filing date Title
US3115793A Power transmission apparatus
GB953024A Friction clutches
US3084565A Variable ratio power transmission apparatus
GB936426A Variable ratio power transmission apparatus
DE1179072B Hydraulic switching device for friction clutches in a gear change transmission
US3071025A Power transmission apparatus
GB933950A Improvements in or relating to variable ratio power transmission apparatus
GB930155A Variable ratio power transmission apparatus
GB971873A Variable ratio power transmission apparatus
GB915906A Improvements in or relating to variable-ratio power transmission apparatus
DE1153634B Drive block for motor vehicles consisting of a clutch, epicyclic gear and differential gear
US3089305A Internal combustion engines and power transmission therefor
US3043163A Variable speed transmission apparatus
GB927633A Internal combustion engines and power transmission apparatus therefor
GB879430A Improvements in or relating to variable speed transmission apparatus
DE1159278B Pressure control valve for the hydraulic pressure medium for actuating clutches and brakes in motor vehicle gearboxes
US2920499A Power transmission apparatus
GB803874A Improvements in or relating to variable-ratio power transmission apparatus
DE1139393B Pressure control valve for the control device of a torque converter, especially for motor vehicles
DE1127164B Two-stage gear change gear