Granted Patent
Utility
US 4,930,232 · App. 07/329,557
Multilayer shoe sole
Inventor:
Norman Engle
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Mar 28, 1989
Inventor
Norman Engle
Assignee (at issue)
The United States Shoe Corporation
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.