Granted Patent
Utility
US 6,220,342 · App. 09/107,466
Laminated heat exchanger
Inventors:
Kunihiko Nishishita, Seiji Inoue, Kiyoshi Tanda, Hitoshi Sakata
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Jun 30, 1998
Inventors
Kunihiko Nishishita
Seiji Inoue
Kiyoshi Tanda
Hitoshi Sakata
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.