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HART MFG CANADA LTD

Overview
  • Total Patents
    12
About

HART MFG CANADA LTD has a total of 12 patent applications. Its first patent ever was published in 1954. It filed its patents most often in Canada and United States. Its main competitors in its focus markets electrical machinery and energy are GUANGDONG GALANZ MICROWAVE OVEN ELECTRICAL APPLIAN, SCHERBIUS & RITTER and APPLIANCE MFG CO INC.

Patent filings in countries

World map showing HART MFG CANADA LTDs patent filings in countries
# Country Total Patents
#1 Canada 10
#2 United States 2

Patent filings per year

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

Focus industries

# Industry
#1 Electrical machinery and energy

Top inventors

# Name Total Patents
#1 Richardson Douglas W 7
#2 William Richardson Douglas 2
#3 Sabiston Malcolm R 2
#4 Landin Carl A 1
#5 Boardman Raymond H 1
#6 Elmer William Bull 1
#7 Rinaldo Sabiston Malcolm 1

Latest patents

Publication Filing date Title
US3201546A Power controlling device for electrical heating elements
US2800564A Self-controlled heating unit
CA484327A Switch spindle
CA604189A Temperature responsive switch device
CA664933A Power controlling device for electrical heating elements
CA495400A Electric switches
CA604201A Self-controlled immersion heating unit
CA603866A Electrical outlet receptacle
CA516537A Control system for electric cooking ovens
CA558630A Electrical circuit for rangettes
CA659392A Gang switch
CA623530A Double wire connector