Granted Patent
Utility
US 4,772,149 · App. 07/035,466
Sheet binder mechanism
Inventor:
David M. Wright
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Apr 3, 1987
Inventor
David M. Wright
Assignee (at issue)
WRIGHT LINE, LLC
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.