Granted Patent
Utility
US 5,345,672 · App. 08/125,673
Brake drum manufacture
Inventors:
Richard C. Ball, Elvin E. Tuttle, David W. Kratzer
Patented Case
View Patent ↗
Granted: Sep 13, 1994
Filed: Sep 23, 1993
Inventors
Richard C. Ball
Elvin E. Tuttle
David W. Kratzer
Assignee (at issue)
Motor Wheel 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.