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Daniel J. Birgen
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Graham, WA, US
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Patents Grants
last 30 patents
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Patent Grant
Heat exchanger liquid refrigerant defrost system
Patent number
7,171,817
Issue date
Feb 6, 2007
Daniel J. Birgen
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Patents Applications
last 30 patents
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Patent Application
Heat exchanger liquid refrigerant defrost system
Publication number
20060144060
Publication date
Jul 6, 2006
Daniel J. Birgen
F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...