Granted Patent
Utility
US 5,004,356 · App. 07/443,000
Fastener and wrapping bag having the same
Inventor:
Kazufumi Matsui
Patented Case
View Patent ↗
Granted: Apr 2, 1991
Filed: Nov 28, 1989
Inventor
Kazufumi Matsui
Assignee (at issue)
Idemitsu Petrochemical Co., Ltd.
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.