Granted Patent
Utility
US 5,582,307 · App. 08/436,885
Railway car coupler knuckle
Inventors:
V. Terry Hawthorne, Horst T. Kaufhold, George G. Schwinn
Patented Case
View Patent ↗
Granted: Dec 10, 1996
Filed: May 8, 1995
Inventors
V. Terry Hawthorne
Horst T. Kaufhold
George G. Schwinn
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.