Granted Patent
Utility
US 4,741,972 · App. 06/941,337
Rotomold insert
Inventor:
James S. Hardigg
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Dec 15, 1986
Inventor
James S. Hardigg
Assignee (at issue)
Hardigg 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.