Granted Patent
Utility
US 5,931,225 · App. 09/207,638
Laminated heat exchanger
Inventors:
Kunihiko Nishishita, Muneo Sakurada, Seiji Inoue
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Dec 9, 1998
Inventors
Kunihiko Nishishita
Muneo Sakurada
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.