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RALPH JOHN SMITH

Overview
  • Total Patents
    18
About

RALPH JOHN SMITH has a total of 18 patent applications. Its first patent ever was published in 1919. It filed its patents most often in United Kingdom and Germany. Its main competitors in its focus markets mechanical elements and engines, pumps and turbines are EBERT HEINRICH DR ING, CRANKLESS ENGINES LTD and HEINRICH EBERT DR ING.

Patent filings in countries

World map showing RALPH JOHN SMITHs patent filings in countries
# Country Total Patents
#1 United Kingdom 17
#2 Germany 1

Patent filings per year

Chart showing RALPH JOHN SMITHs patent filings per year from 1900 to 2020

Latest patents

Publication Filing date Title
GB549827A Improvements in or relating to control devices for superchargers
GB547438A Improvements in or relating to fluid-pressure-operated relays
GB515768A Improvements in or relating to rotary pumps or motors
GB404385A Improvements in the control of hydraulic transmission gear
GB405670A Improvements in hydraulic pumps and motors of hydraulic transmission gear
GB401654A Improved means for the remote control of locomotives, engines and other machines
GB389962A Improvements relating to the driving means of locomotives and like self propelled vehicles
GB379210A Improved means for preventing leakage along rotating shafts
GB393645A Improvements in hydraulic transmission gear
GB336340A Improvements relating to hydraulic pumps and motors for hydraulic transmission gear
GB321313A Improvements in hydraulic pumps & motors
GB222647A Improvements relating to hydraulic change speed gears
GB222300A Improvements relating to hydraulic change speed gears
GB203867A Improvements in hydraulic change speed gears
GB194087A Improvements in hydraulic change speed gears
GB137639A Improvements relating to the transmission of motion at variable speeds
GB137638A Improvements relating to the transmission of motion at variable speeds