Granted Patent
Utility
US 4,720,039 · App. 07/026,627
Paperboard container
Inventor:
Yoichi Nishiguchi
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Mar 17, 1987
Inventor
Yoichi Nishiguchi
Assignee (at issue)
Jujo Paper 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.