Granted Patent
Utility
US 6,832,559 · App. 10/296,945
Roller rail clamp
Inventor:
John Allen
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: May 30, 2003
Inventor
John Allen
Assignee (at issue)
Queensland Rail
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.