Granted Patent
Utility
US 6,711,892 · App. 10/276,824
Exhaust gas purifier for internal combustion engines
Inventors:
Yasuki Tamura, Kojiro Okada, Tomohiro Ohashi, Naoto Yamada, Kazuo Koga
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Nov 18, 2002
Inventors
Yasuki Tamura
Kojiro Okada
Tomohiro Ohashi
Naoto Yamada
Kazuo Koga
Assignee (at issue)
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
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.