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SPENCER THERMOSTAT CO

Overview
  • Total Patents
    82
About

SPENCER THERMOSTAT CO has a total of 82 patent applications. Its first patent ever was published in 1921. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets electrical machinery and energy, machines and control are AUTOMATIC CONTROL CORP, PENN ELECTRIC SWITCH CO and OLVIS SMELTZEKERINGEN.

Patent filings in countries

World map showing SPENCER THERMOSTAT COs patent filings in countries
# Country Total Patents
#1 United States 44
#2 Canada 25
#3 United Kingdom 7
#4 Germany 3
#5 France 2
#6 Austria 1

Patent filings per year

Chart showing SPENCER THERMOSTAT COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Spencer John A 47
#2 Marshall Laurence K 9
#3 Maurer Rufus H 5
#4 Gregory Eli E 3
#5 Sellman Nils T 2
#6 Vannevar Bush 1
#7 George Schaefer August 1
#8 Johnson Norman E 1

Latest patents

Publication Filing date Title
US2076045A Thermostatically controlled gas valve
US1916498A Temperature controlled apparatus
GB365079A Ignition systems for gas burners and the like
US1895590A Snap acting device
US1972170A Valve
US1883250A Valve
US1983822A Safety device for burners and the like
US1883046A Thermostatic switch
US1942009A Valve
US1848031A Valve
US1901251A Ignition system for gas burners
US1972169A Valve
US1859580A Valve
US1845357A Temperature controlled apparatus
GB300507A Safety devices for burners
US1883249A Thermostat
US1881807A Remote heat control mechanism
US1711398A Safety device for burners
GB275527A Improvements in temperature responsive devices
US1700173A Metallic thermostat