Granted Patent
Utility
US 4,264,228 · App. 06/091,900
Composite looseleaf mechanism
Inventor:
Henry N. Staats
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Nov 7, 1979
Inventor
Henry N. Staats
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.