Granted Patent
Utility
US 5,526,876 · App. 08/544,310
Heat exchanger
Inventor:
Toshikatsu Karube
Patented Case
View Patent ↗
Granted: Jun 18, 1996
Filed: Oct 17, 1995
Inventor
Toshikatsu Karube
Assignee (at issue)
Showa Aluminum Corp.
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.