Granted Patent
Utility
US 5,983,447 · App. 09/094,845
Counterbalance system for pickup hose support
Inventor:
Steven L. Boomgaarden
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Jun 15, 1998
Inventor
Steven L. Boomgaarden
Assignee (at issue)
TENNANT COMPANY
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.