Granted Patent
Utility
US 4,825,319 · App. 07/067,488
Cartridge-shaped cleaning device
Inventor:
Sam Andreas
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Jun 26, 1987
Inventor
Sam Andreas
Assignee (at issue)
Recoton 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.