Granted Patent
Utility
US 4,988,558 · App. 07/357,254
Laminated film
Inventor:
Hiromi Shigemoto
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: May 26, 1989
Inventor
Hiromi Shigemoto
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.