Granted Patent
Utility
US 4,835,820 · App. 07/151,271
Bag closure device
Inventor:
Edward S. Robbins, III
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Feb 1, 1988
Inventor
Edward S. Robbins, III
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.