Granted Patent
Utility
US 5,312,007 · App. 07/986,862
Slackless railway coupler with draft/buff gear
Inventors:
Horst T. Kaufhold, John J. Steffen, David John Jarvis, David Greg Anderson, Ronald G. Butler
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: Dec 4, 1992
Inventors
Horst T. Kaufhold
John J. Steffen
David John Jarvis
David Greg Anderson
Ronald G. Butler
Assignee (at issue)
AMSTED INDUSTRIES INCORPORATED
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.