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Rodney Grahame COLWELL
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Brisbane, AU
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Patents Grants
last 30 patents
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Patent Grant
Geothermal loop in-ground heat exchanger for energy extraction
Patent number
9,541,309
Issue date
Jan 10, 2017
Controlled Thermal Technologies Pty Ltd.
Rodney Grahame Colwell
F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
Patents Applications
last 30 patents
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Patent Application
GEOTHERMAL LOOP IN-GROUND HEAT EXCHANGER FOR ENERGY EXTRACTION
Publication number
20150122453
Publication date
May 7, 2015
CONTROLLED THERMAL TECHNOLOGIES PTY LTD
Rodney Grahame COLWELL
F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...