Granted Patent
Utility
US 6,161,528 · App. 09/182,282
Recirculating exhaust gas cooling device
Inventors:
Yoshiyuki Akao, Norio Nakazawa, Hiroshi Ogita
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Oct 29, 1998
Inventors
Yoshiyuki Akao
Norio Nakazawa
Hiroshi Ogita
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.