Granted Patent
Utility
US 6,129,227 · App. 08/636,033
Lightweight knuckle for a railroad car coupler
Inventors:
Richard A. Openchowski, Scott A. Beatty, Andreas Haas, Kenneth F. Packer, Jiten V. Shah
Patented Case
View Patent ↗
Granted: Oct 10, 2000
Filed: Apr 22, 1996
Inventors
Richard A. Openchowski
Scott A. Beatty
Andreas Haas
Kenneth F. Packer
Jiten V. Shah
Assignee (at issue)
National Casting 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.