Granted Patent
Utility
US 6,655,164 · App. 10/216,066
Combined heating and cooling system
Inventor:
Jorgen H. Rogstam
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: Aug 9, 2002
Inventor
Jorgen H. Rogstam
Assignee (at issue)
Delphi Technologies
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.