Granted Patent
Utility
US 6,637,667 · App. 10/268,070
Method and apparatus for energy recovery in an environmental control system
Inventors:
Dale A. Gauthier, Guy D. Covert
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Oct 7, 2002
Inventors
Dale A. Gauthier
Guy D. Covert
Assignee (at issue)
Pentech Solutions, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.