Granted Patent
Utility
US 4,664,974 · App. 06/870,445
Surface-reinforced foam article
Inventor:
Kent Sherwood
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Jun 4, 1986
Inventor
Kent Sherwood
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.