Granted Patent
Utility
US 4,289,077 · App. 06/042,256
Railway center bearing wear liner
Inventors:
Donald L. Kleykamp, Homer N. Holden
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: May 24, 1979
Inventors
Donald L. Kleykamp
Homer N. Holden
Assignee (at issue)
DayCo Holdings, LP
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.