Granted Patent
Utility
US 5,296,580 · App. 08/097,921
Stretch packaging method employing multi-layer film
Inventors:
Takashi Matsunaga, Keiichi Miura
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: Jul 28, 1993
Inventors
Takashi Matsunaga
Keiichi Miura
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.