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LEONARD VALVE COMPANY

Overview
  • Total Patents
    23
About

LEONARD VALVE COMPANY has a total of 23 patent applications. Its first patent ever was published in 1940. It filed its patents most often in Canada, United States and United Kingdom. Its main competitors in its focus markets control, machines and mechanical elements are INT GAS APPARATUS LTD, PROIZV OB KIEVPROMARMATURA and NASH NATHAN E.

Patent filings in countries

World map showing LEONARD VALVE COMPANYs patent filings in countries
# Country Total Patents
#1 Canada 9
#2 United States 8
#3 United Kingdom 6

Patent filings per year

Chart showing LEONARD VALVE COMPANYs patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Bowman Lawrence E 10
#2 Coppage Frederick C 2
#3 Leonard Frederick C 2
#4 Drummond George H 2
#5 Erich Schafranik 1
#6 Shafranik Erich 1
#7 Rietzel Charles W 1
#8 Bowman Lawrence Everton 1

Latest patents

Publication Filing date Title
GB1274369A Mixing valve
GB1162583A Mixing Valve
US3152760A Fluid mixing device
GB935937A Liquid mixing device
US3007644A Temperature control valve
US3061195A Fluid mixing device
US2970770A Thermostatic mixing valve
US2910243A Heater valve
GB732648A Thermostatic fluid mixing valve
GB724422A Combination thermostatic mixing and shut-off valve construction
US2691487A Combination thermostatic mixing and shutoff valve construction
GB545555A Improvements in or relating to fluid mixing devices
US2308487A Thermostatic valve construction
US2302256A Valve construction
CA663689A Fluid mixing device
CA394114A Thermostatic mixer
CA640086A Temperature control valve
CA629448A Thermostatic valve
CA394115A Thermostatic mixing valve
CA507586A Combination thermostatic mixing and shut-off valve construction