Granted Patent
Utility
US 4,333,202 · App. 06/108,295
Floor scrubber with combined solution and recovery tank
Inventor:
Thomas S. Block
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Dec 28, 1979
Inventor
Thomas S. Block
Assignee (at issue)
MCGRAW-EDISON 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.