Granted Patent
Utility
US 4,763,819 · App. 06/921,555
Spreader hopper with moisture guard
Inventor:
Robert A. Germain
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Oct 21, 1986
Inventor
Robert A. Germain
Assignee (at issue)
Emhart Industries, 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.