Granted Patent
Utility
US 5,787,973 · App. 08/637,275
Heat exchanger
Inventors:
Hirotaka Kado, Akimichi Watanabe
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Apr 25, 1996
Inventors
Hirotaka Kado
Akimichi Watanabe
Assignee (at issue)
SANDEN CORPORATION
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.