Granted Patent
Utility
US 4,909,410 · App. 07/356,349
Protective cover for bulk container
Inventors:
Norwin C. Derby, Ernest J. Benson
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: May 24, 1989
Inventors
Norwin C. Derby
Ernest J. Benson
Assignee (at issue)
Better Agricultural Goals Corporation
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.