Granted Patent
Utility
US 4,449,362 · App. 06/326,527
Exhaust system for an internal combustion engine, burn-off unit and methods therefor
Inventors:
Alfred A. Frankenberg, Douglas R. Scott
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Dec 2, 1981
Inventors
Alfred A. Frankenberg
Douglas R. Scott
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE LIMITED
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.