Granted Patent
Utility
US 5,319,910 · App. 07/972,812
Easily-openable packaging container
Inventors:
Yukio Takata, Takeshi Shinohara
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Nov 6, 1992
Inventors
Yukio Takata
Takeshi Shinohara
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.