Granted Patent
Utility
US 5,548,868 · App. 08/502,273
Pilot and detent apparatus for a vacuum device
Inventors:
Robert C. Berfield, Alan D. Kaufman
Patented Case
View Patent ↗
Granted: Aug 27, 1996
Filed: Jul 13, 1995
Inventors
Robert C. Berfield
Alan D. Kaufman
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.