Granted Patent
Utility
US 4,900,211 · App. 07/346,919
Apparatus for binding materials using a curled-finger ring-type binder
Inventor:
Alfredo J. Vercillo
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: May 3, 1989
Inventor
Alfredo J. Vercillo
Assignee (at issue)
General Binding 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.