Granted Patent
Utility
US 6,732,789 · App. 10/445,905
Heat exchanger for CO2 refrigerant
Inventor:
Kil Sang Jang
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: May 28, 2003
Inventor
Kil Sang Jang
Assignee (at issue)
HALLA CLIMATE CONTROL CORP.
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.