Granted Patent
Utility
US 4,956,271 · App. 07/375,814
Material treatment
Inventor:
Philip G. Milone
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Jul 5, 1989
Inventor
Philip G. Milone
Assignee (at issue)
Wolverine 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.