Granted Patent
Utility
US 5,177,828 · App. 07/747,383
Missing pad detector for a floor polishing tool
Inventor:
Peter W. Von Vett
Patented Case
View Patent ↗
Granted: Jan 12, 1993
Filed: Aug 20, 1991
Inventor
Peter W. Von Vett
Assignee (at issue)
Windsor Industries, Inc.
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.