Granted Patent
Utility
US 5,454,454 · App. 08/376,098
Polygonal friction disk and method
Inventors:
John J. Easton, James Macey, James J. Petroski
Patented Case
View Patent ↗
Granted: Oct 3, 1995
Filed: Jan 20, 1995
Inventors
John J. Easton
James Macey
James J. Petroski
Assignee (at issue)
Raybestos Products Company
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.