Granted Patent
Utility
US 5,551,506 · App. 08/361,555
Laminated heat exchanger
Inventor:
Kunihiko Nishishita
Patented Case
View Patent ↗
Granted: Sep 3, 1996
Filed: Dec 22, 1994
Inventor
Kunihiko Nishishita
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.