Granted Patent
Utility
US 5,358,034 · App. 08/125,309
Heat exchanger
Inventors:
Kunihiko Nishishita, Tadaaki Ishikawa, Yasuyuki Nagakura, Takashi Sugita
Patented Case
View Patent ↗
Granted: Oct 25, 1994
Filed: Sep 23, 1993
Inventors
Kunihiko Nishishita
Tadaaki Ishikawa
Yasuyuki Nagakura
Takashi Sugita
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.