Granted Patent
Utility
US 5,079,796 · App. 07/628,708
Nozzle assembly for a vacuum device
Inventors:
Robert C. Berfield, Ronald F. Meland
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Dec 17, 1990
Inventors
Robert C. Berfield
Ronald F. Meland
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.