Granted Patent
Utility
US 5,555,596 · App. 08/454,626
Floor cleaning apparatus
Inventors:
Christopher M. Knowlton, Robert J. O'Hara
Patented Case
View Patent ↗
Granted: Sep 17, 1996
Filed: May 31, 1995
Inventors
Christopher M. Knowlton
Robert J. O'Hara
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.