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COLUMBIA GAS SYST

Overview
  • Total Patents
    143
About

COLUMBIA GAS SYST has a total of 143 patent applications. Its first patent ever was published in 1965. It filed its patents most often in United States, Canada and Australia. Its main competitors in its focus markets thermal processes, environmental technology and basic materials chemistry are INTEROTEX LTD, ARKLA IND and HITACHI BILL SHISETSU ENG KK.

Patent filings per year

Chart showing COLUMBIA GAS SYSTs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Reid Edward A Jr 29
#2 Cook F Bert 22
#3 Winter Edward M 16
#4 Purvis Edgar M Jr 12
#5 Krause Horatio H Jr 10
#6 Cook Bert F 8
#7 Petty Stephen E 8
#8 Reid Jr Edward A 8
#9 Jatana Subhash C 7
#10 Teague Walter Dorwin Jr 7

Latest patents

Publication Filing date Title
CA1313766C Absorption refrigeration and heat pump system
AU7303891A Absorption refrigeration and heat pump system with defrost
US5077986A Energy recovery system for absorption heat pumps
US5067330A Heat transfer apparatus for heat pumps
US4805450A Method of locating hydrocarbon producing strata and the instrument therefor
CA1285398C Absorption refrigeration and heat pump system
CA1281192C Absorption refrigeration and heat pump system
US4783990A Apparatus for measuring the quantity of gas pumped by a compressor
US4773255A Apparatus for injecting gas into a pipeline
US4658750A Apparatus and method for detecting gas bubbles in water, and apparatus for handling an oceanographic device
US4676095A Apparatus for measuring the work performed by a gas compressor
CA1288605C Absorption refrigeration and heat pump system
US4690689A Gas tracer composition and method
US4641631A Apparatus and method for burning a combustible gas, and a heat exchanger for use in this apparatus
US4641588A Heat shield
US4646541A Absorption refrigeration and heat pump system
US4538460A Method for determining permeability
US4623435A Backfill for magnesium anodes
US4541410A Apparatus and method for burning a combustible gas, and a heat exchanger for use in this apparatus
US4571984A Apparatus and method for detecting gas bubbles in water, and apparatus for handling an oceanographic device