Granted Patent
Utility
US 4,327,839 · App. 06/170,501
Wear member for railway vehicle and method of making same
Inventors:
Donald L. Kleykamp, Julien C. Mathieu
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: Jul 21, 1980
Inventors
Donald L. Kleykamp
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.