Granted Patent
Utility
US 6,484,644 · App. 09/835,862
Railcar structure for accommodating a brake valve
Inventors:
James W. Forbes, Richard C. Haight
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Apr 16, 2001
Inventors
James W. Forbes
Richard C. Haight
Assignee (at issue)
National Steel Car Limited
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.