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HARPER ELECTRIC FURNACE CORP

Overview
  • Total Patents
    23
About

HARPER ELECTRIC FURNACE CORP has a total of 23 patent applications. Its first patent ever was published in 1925. It filed its patents most often in United States and Canada. Its main competitors in its focus markets thermal processes, electrical machinery and energy and machines are EMIL FRIEDRICH RUSS, APV PARALEC LTD and SCHLIENGER M.

Patent filings in countries

World map showing HARPER ELECTRIC FURNACE CORPs patent filings in countries
# Country Total Patents
#1 United States 14
#2 Canada 9

Patent filings per year

Chart showing HARPER ELECTRIC FURNACE CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 James Kelleher 9
#2 Kelleher James 7
#3 Fitz Gerald Francis A J 4
#4 Fitzgerald Francis A J 4
#5 Harper Roderick L 2
#6 Macdonald Jr Robert 1
#7 Macdonald Robert Jr 1
#8 Robertson James R 1

Latest patents

Publication Filing date Title
US4062459A Conveyor for heat treating furnace
US2009732A Electric resistor
US1764045A Terminal
US1714081A Electric furnace
US1841537A Electric furnace resistor
US1588473A Method of making carborundum structures
US1643775A Tunnel kiln
US1681939A Tunnel kiln
US1637486A Electric furnace
US1742259A Electrical resistor, conductor, and the like
US1647524A Electric tunnel kiln
US1749762A Tunnel kiln and method of operating the same
US1573543A Tunnel kiln
US1646058A Electric furnace
CA293358A Electric furnace resistor
CA288083A Electrical resistor, conductor, etc.
CA300165A Method of operating tunnel kilns
CA332023A Electrical resister
CA293357A Electric furnace
CA293820A Electric furnace terminal