Granted Patent
Utility
US 4,580,815 · App. 06/521,341
Composite strip for add-on tab for file folder
Inventor:
Donald T. Barber
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: Aug 8, 1983
Inventor
Donald T. Barber
Assignee (at issue)
Datafile Limited
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.