Granted Patent
Utility
US 3,970,174 · App. 05/577,914
Low wear disk brake assembly
Inventor:
Fred P. Kirkhart
Patented Case
View Patent ↗
Granted: Jul 20, 1976
Filed: May 15, 1975
Inventor
Fred P. Kirkhart
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.