Granted Patent
Utility
US 4,264,015 · App. 06/026,478
Railway coupler wear member
Inventor:
Julien C. Mathieu
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Apr 2, 1979
Inventor
Julien C. Mathieu
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.