Granted Patent
Utility
US 5,097,807 · App. 07/678,180
Combustion chamber for diesel engines
Inventors:
Hiroshi Oikawa, Naohisa Nakashima, Minoru Matsui, Tadao Ozawa
Patented Case
View Patent ↗
Granted: Mar 24, 1992
Filed: Mar 29, 1991
Inventors
Hiroshi Oikawa
Naohisa Nakashima
Minoru Matsui
Tadao Ozawa
Assignees (at issue)
MITSUBISHI MOTORS CORPORATION
NGK INSULATORS, LTD.
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.