Granted Patent
Utility
US 4,588,463 · App. 06/569,576
Method of producing a reinforced file folder
Inventors:
Donald T. Barber, Erhard P. Walter
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Jan 10, 1984
Inventors
Donald T. Barber
Erhard P. Walter
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.