Granted Patent
Utility
US 4,834,054 · App. 07/177,963
Method of detecting a fault of an exhaust gas recirculation system
Inventors:
Toru Hashimoto, Akira Takahashi, Takeshi Imaizumi, Susumu Saito, Hiroshi Tanaka, Takeshi Jimbo
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Apr 5, 1988
Inventors
Toru Hashimoto
Akira Takahashi
Takeshi Imaizumi
Susumu Saito
Hiroshi Tanaka
Takeshi Jimbo
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.