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Patent applications and USPTO patent grants for Schaefer, Jr.; James Thomas.The latest application filed is for "system and method for oil return in an hvac system".
Patent | Date |
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System and Method for Oil Return in an HVAC System App 20130067943 - Douglas; Jonathan David ;   et al. | 2013-03-21 |
System and method for controlling working fluid charge in a vapor compression air conditioning system Grant 7,866,172 - Douglas , et al. January 11, 2 | 2011-01-11 |
System and Method For Controlling Working Fluid Charge In A Vapor Compression Air Conditioning System App 20100101246 - DOUGLAS; Jonathan David ;   et al. | 2010-04-29 |
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