Granted Patent
Utility
US 5,957,309 · App. 08/704,007
Tray rack
Inventor:
Donald M. Hall
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Aug 23, 1996
Inventor
Donald M. Hall
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.