Granted Patent
Utility
US 4,864,675 · App. 07/148,523
Butterfly sponge mop
Inventor:
David A. Jones
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Jan 25, 1988
Inventor
David A. Jones
Assignee (at issue)
The Drackett Company
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.