Granted Patent
Utility
US 6,416,832 · App. 09/331,508
Packaging film or sheet
Inventors:
Tsutomu Uehara, Hitoshi Ishii, Hajime Tsukamoto
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Jun 22, 1999
Inventors
Tsutomu Uehara
Hitoshi Ishii
Hajime Tsukamoto
Assignee (at issue)
Kureha Kagaku Kogyo K.K.
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.