Granted Patent
Utility
US 5,718,284 · App. 08/751,423
Laminated heat exchanger
Inventor:
Kunihiko Nishishita
Patented Case
View Patent ↗
Granted: Feb 17, 1998
Filed: Nov 18, 1996
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.