Granted Patent
Utility
US 4,611,562 · App. 06/666,470
Method and system for internal combustion engine oxygen sensor heating control which provide sensor heating limited for reliable operation
Inventors:
Jiro Nakano, Takao Ishibashi, Takao Akatsuka, Masao Kawaguchi
Patented Case
View Patent ↗
Granted: Sep 16, 1986
Filed: Oct 30, 1984
Inventors
Jiro Nakano
Takao Ishibashi
Takao Akatsuka
Masao Kawaguchi
Assignee (at issue)
TOYOTA JIDOSHA 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.