Granted Patent
Utility
US 5,865,243 · App. 08/071,030
Heat exchanger
Inventors:
Soichi Kato, Takashi Sugita
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: May 4, 1998
Inventors
Soichi Kato
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.