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HART MFG CO

Overview
  • Total Patents
    147
About

HART MFG CO has a total of 147 patent applications. Its first patent ever was published in 1901. 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 machine tools are ARROW HART & HEGEMAN ELECTRIC, HART & HEGEMAN MFG CO and LOUIS KELLNER.

Patent filings in countries

World map showing HART MFG COs patent filings in countries
# Country Total Patents
#1 United States 94
#2 Canada 19
#3 United Kingdom 17
#4 France 13
#5 Germany 2
#6 Austria 1
#7 Switzerland 1

Patent filings per year

Chart showing HART MFG COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hart Gerald W 35
#2 Hart Louis F 14
#3 Hart George H 11
#4 Leppert Henry E 10
#5 Bengtsson Bertil S 8
#6 Boardman Raymond H 8
#7 Landin Carl A 6
#8 Smart Ezra E 5
#9 Birk Harold W 2
#10 Gates Frederic P 2

Latest patents

Publication Filing date Title
US3359389A Bimetal snap switch with disconnect lever to prevent contacts from permanently welding
GB867395A Improvements in polarized electromagnetic relays
US3032865A Assembly device for bus bars
GB865023A Electrical bus bar
DE1131294B Flat conductor busbar
GB864735A Heater and thermostat control assembly
DE1166950B Electric hotplate
US2954513A Polarized relay
US2907848A Electromagnetic relay
US2981926A Bus bar
US2988625A Heater and thermostat control assembly
US3069523A Thermostat switch
GB803010A Cover plate assembly for switch boxes and the like
GB791307A Electric switch with rockable contact member
US2780691A Electric switch
US2889125A Fastener for retaining casings in panels
US2730688A Fastener for retaining a casing in a panel
US2720634A Quick detachable electrical connector
US2782960A Cover plate assembly
US2774852A Electric switch