Granted Patent
Utility
US 4,445,618 · App. 06/335,828
Spring biased rotary railway car coupler carrier
Inventor:
Frederick C. Kulieke, Jr.
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Dec 30, 1981
Inventor
Frederick C. Kulieke, Jr.
Assignee (at issue)
Midland-Ross Corporation
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.