Granted Patent
Utility
US 4,398,641 · App. 06/261,334
Inversion protection for railroad car coupler
Inventor:
Richard F. Klimowicz
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: May 7, 1981
Inventor
Richard F. Klimowicz
Assignee (at issue)
Dresser Industries, Inc.
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.