Granted Patent
Utility
US 6,499,182 · App. 09/867,069
Convertible blower port for vacuum cleaner
Inventors:
Robert C. Berfield, Ronald Griffin, Kevin D. Fry, Randy L. Buss
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: May 29, 2001
Inventors
Robert C. Berfield
Ronald Griffin
Kevin D. Fry
Randy L. Buss
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.