Granted Patent
Utility
US 4,957,798 · App. 07/331,183
Composite open-cell foam structure
Inventor:
John Bogdany
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Mar 31, 1989
Inventor
John Bogdany
Assignee (at issue)
Resilient Systems, 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.