Granted Patent
Utility
US 6,173,764 · App. 09/388,554
Laminated heat exchanger
Inventor:
Seiji Inoue
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Sep 2, 1999
Inventor
Seiji Inoue
Assignee (at issue)
Zexel GmbH
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.