Granted Patent
Utility
US 5,356,284 · App. 07/723,601
Stack mold with spring loaded blow off pin
Inventor:
James Sheffield
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: Jul 1, 1991
Inventor
James Sheffield
Assignee (at issue)
Izon Industries Inc.
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.