Granted Patent
Utility
US 4,998,969 · App. 07/523,328
Engine maintenance fluid introduction system
Inventors:
William W. Bowers, M. Jeremy Lieb, Robert Shockey
Patented Case
View Patent ↗
Granted: Mar 12, 1991
Filed: May 14, 1990
Inventors
William W. Bowers
M. Jeremy Lieb
Robert Shockey
Assignee (at issue)
Outboard Marine 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.