Granted Patent
Utility
US 4,900,490 · App. 07/361,761
Foam material
Inventor:
Matthew L. Kozma
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Jun 5, 1989
Inventor
Matthew L. Kozma
Assignee (at issue)
Packaging Industries Group, 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.