Granted Patent
Utility
US 6,722,287 · App. 10/071,173
Roof assembly and airflow management system for a temperature controlled railway car
Inventors:
Allen E. Norton, Stephen W. Smith, William A. Knapp, Alex Hoover, Ronald Zupancich, James Sommer
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Feb 8, 2002
Inventors
Allen E. Norton
Stephen W. Smith
William A. Knapp
Alex Hoover
Ronald Zupancich
James Sommer
Assignee (at issue)
TRN Business Trust
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.