Granted Patent
Utility
US 4,306,359 · App. 06/120,256
Material treatment system
Inventor:
Charles W. Hoyt
Patented Case
View Patent ↗
Granted: Dec 22, 1981
Filed: Feb 11, 1980
Inventor
Charles W. Hoyt
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.