Granted Patent
Utility
US 4,964,561 · App. 07/365,081
Self-locking carton
Inventor:
Harry I. Whelan
Patented Case
View Patent ↗
Granted: Oct 23, 1990
Filed: Jun 12, 1989
Inventor
Harry I. Whelan
Assignee (at issue)
Inland Container 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.