Granted Patent
Utility
US 4,867,279 · App. 06/297,680
Low-profile railway car retarder
Inventors:
Charles T. Link, Bennie M. Gray, Harold L. Shumaker
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Aug 31, 1981
Inventors
Charles T. Link
Bennie M. Gray
Harold L. Shumaker
Assignee (at issue)
American Standard 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.