Granted Patent
Utility
US 4,878,600 · App. 07/220,432
Static controlled discharge spout
Inventor:
Norwin C. Derby
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Jul 13, 1988
Inventor
Norwin C. Derby
Assignee (at issue)
Super Sack Mfg. Corp.
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.