Granted Patent
Utility
US 5,768,782 · App. 08/661,145
Flat tube for heat exchanger and method for manufacturing it
Inventor:
Soichi Kato
Patented Case
View Patent ↗
Granted: Jun 23, 1998
Filed: Jun 10, 1996
Inventor
Soichi Kato
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.