Granted Patent
Utility
US 5,664,648 · App. 08/317,789
Prestressed brake drum or rotor
Inventor:
Larry B. Hester
Patented Case
View Patent ↗
Granted: Sep 9, 1997
Filed: Oct 4, 1994
Inventor
Larry B. Hester
Assignee (at issue)
Dayton Walther 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.