Granted Patent
Utility
US 6,250,381 · App. 09/530,416
Heat exchanger
Inventor:
Kunihiko Nishishita
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: May 1, 2000
Inventor
Kunihiko Nishishita
Assignees (at issue)
Zexel GmbH
Toyo Radiator Co., Ltd.
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.