Granted Patent
Utility
US 5,984,199 · App. 08/927,627
Backpack sprayer with an expandable accumulator chamber
Inventor:
Mario J. Restive
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Sep 11, 1997
Inventor
Mario J. Restive
Assignee (at issue)
THE FOUNTAINHEAD GROUP, INC.
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.