Granted Patent
Utility
US 4,741,085 · App. 06/912,888
Repair of railway cushioning apparatus
Inventor:
Charles T. Bomgardner
Patented Case
View Patent ↗
Granted: May 3, 1988
Filed: Sep 25, 1986
Inventor
Charles T. Bomgardner
Assignee (at issue)
Halliburton
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.