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DARM WILLIAM J

Overview
  • Total Patents
    14
About

DARM WILLIAM J has a total of 14 patent applications. Its first patent ever was published in 1970. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets thermal processes, machine tools and machines are LEVEL HOLDING BV, ELYT 3 and LEVEL ENERGIETECH BV.

Patent filings in countries

World map showing DARM WILLIAM Js patent filings in countries
# Country Total Patents
#1 United States 6
#2 Canada 2
#3 Germany 2
#4 Sweden 2
#5 Italy 1
#6 Japan 1

Patent filings per year

Chart showing DARM WILLIAM Js patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Darm William J 11
#2 Uiriamu Jiyon Daamu 1

Latest patents

Publication Filing date Title
CA1053221A Vertical counterflow heat exchanger apparatus
CA1020930A Heat exchanger apparatus with spacer projections between plates
US3995688A Air-to-air heat exchanger
US4140175A Vertical counterflow heat exchanger apparatus
US3912004A Heat exchanger apparatus with spacer projections between plates
US3982588A Grease-collecting heat exchanger installation
US3905850A Method of manufacture of an air-to-air heat exchanger
US3656542A Ventilating system for compartmented buildings