Granted Patent
Utility
US 6,672,389 · App. 10/210,724
Bulged single-hinged scored rupture having a non-circular varying depth score line
Inventor:
James O. Hinrichs
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Jul 31, 2002
Inventor
James O. Hinrichs
Assignee (at issue)
Fike 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.