Granted Patent
Utility
US 4,658,571 · App. 06/792,255
Apparatus and method of making cleaning pads
Inventor:
George Gropper
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Oct 28, 1985
Inventor
George Gropper
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.