Granted Patent
Utility
US 6,119,341 · App. 08/437,808
Method of manufacturing flat tubes for heat exchanger
Inventors:
Soichi Kato, Takashi Sugita
Patented Case
View Patent ↗
Granted: Sep 19, 2000
Filed: May 9, 1995
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.