Granted Patent
Utility
US 4,902,183 · App. 07/346,918
Method and apparatus for binding materials with a curled-finger ring-type binder
Inventors:
Alfredo J. Vercillo, Thomas T. Battisti
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: May 3, 1989
Inventors
Alfredo J. Vercillo
Thomas T. Battisti
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.