Granted Patent
Utility
US 5,609,930 · App. 08/418,376
Bag for packaging heavy materials
Inventors:
Takashi Matsunaga, Toshihiro Nishimura, Hiroshi Inoue
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Apr 7, 1995
Inventors
Takashi Matsunaga
Toshihiro Nishimura
Hiroshi Inoue
Assignee (at issue)
Mitsui Petrochemical Industries, 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.