Granted Patent
Utility
US 5,161,670 · App. 07/819,160
Auxiliary conveying apparatus for elevationally selectable discharge
Inventor:
Joseph S. David
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Jan 7, 1992
Inventor
Joseph S. David
Assignee (at issue)
Joy Technologies Inc.
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.