Granted Patent
Utility
US 4,617,793 · App. 06/578,759
Exhaust-gas particle treating device for internal combustion engine
Inventors:
Shoichi Suzuki, Yamada Keiichi
Patented Case
View Patent ↗
Granted: Oct 21, 1986
Filed: Feb 9, 1984
Inventors
Shoichi Suzuki
Yamada Keiichi
Assignee (at issue)
Diesel Kiki Co., 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.