Granted Patent
Utility
US 4,527,358 · App. 06/527,255
Removable polishing pad assembly
Inventor:
Lawrence Day
Patented Case
View Patent ↗
Granted: Jul 9, 1985
Filed: Aug 29, 1983
Inventor
Lawrence Day
Assignee (at issue)
Federal Signal Corporation
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.