Granted Patent
Utility
US 4,633,541 · App. 06/647,914
Floor treating machine
Inventor:
Thomas S. Block
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Sep 6, 1984
Inventor
Thomas S. Block
Assignee (at issue)
Cooper Industries Holdings
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.