Granted Patent
Utility
US 6,561,740 · App. 09/948,305
Auto rack railroad car panel bumper guard
Inventors:
Michael K. Burke, John D. Anderson, Walter J. Peach
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Sep 6, 2001
Inventors
Michael K. Burke
John D. Anderson
Walter J. Peach
Assignee (at issue)
ZefTek, 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.