Granted Patent
Utility
US 4,467,940 · App. 06/535,250
Metal finishing barrel having a sliding closure
Inventor:
Frank Little
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Sep 23, 1983
Inventor
Frank Little
Assignee (at issue)
Harshaw/Filtrol Partnership
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.