Granted Patent
Utility
US 4,887,330 · App. 07/287,905
Washer attachment for a suction cleaner
Inventors:
Michael B. Woodhall, Brian Gough, Russell G. Wilcox
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Dec 21, 1988
Inventors
Michael B. Woodhall
Brian Gough
Russell G. Wilcox
Assignee (at issue)
SHOP VAC 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.