Granted Patent
Utility
US 5,455,979 · App. 08/139,411
Apparatus for monitoring cleaning element wear
Inventors:
Frederick M. Bores, Robert J. O'Hara, Mark A. Betker
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Oct 20, 1993
Inventors
Frederick M. Bores
Robert J. O'Hara
Mark A. Betker
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.