Granted Patent
Utility
US 6,823,933 · App. 10/077,907
Stacked-type, multi-flow heat exchangers
Inventor:
Tomohiro Chiba
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Feb 20, 2002
Inventor
Tomohiro Chiba
Assignee (at issue)
SANDEN CORPORATION
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.