Granted Patent
Utility
US 4,969,440 · App. 07/355,268
Knocking suppression apparatus for an internal combustion engine
Inventors:
Nobuaki Murakami, Satoshi Komurasaki, Syohichi Katoh
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: May 19, 1989
Inventors
Nobuaki Murakami
Satoshi Komurasaki
Syohichi Katoh
Assignees (at issue)
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
MITSUBISHI ELECTRIC CORPORATION
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.