Granted Patent
Utility
US 5,715,568 · App. 08/570,979
Vacuum apparatus having a pump for discharging liquid therefrom
Inventors:
Robert C. Berfield, Craig A. Seasholtz
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: Dec 12, 1995
Inventors
Robert C. Berfield
Craig A. Seasholtz
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.