Granted Patent
Utility
US 6,561,342 · App. 09/828,009
Granular material conveyor
Inventor:
Charles Lepage
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Apr 6, 2001
Inventor
Charles Lepage
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.