Granted Patent
Utility
US 4,557,356 · App. 06/605,087
Brake disk and keyslot reinforcements therefor
Inventor:
Don W. Petersen
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Apr 30, 1984
Inventor
Don W. Petersen
Assignee (at issue)
Goodyear Aerospace 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.