Granted Patent
Utility
US 6,598,402 · App. 09/946,367
Exhaust gas recirculation type combined plant
Inventors:
Masaki Kataoka, Motoaki Utamura, Takaaki Kuwahara
Patented Case
View Patent ↗
Granted: Jul 29, 2003
Filed: Sep 6, 2001
Inventors
Masaki Kataoka
Motoaki Utamura
Takaaki Kuwahara
Assignee (at issue)
HITACHI, LTD.
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.