Granted Patent
Utility
US 4,297,402 · App. 06/141,580
Packaging bag
Inventors:
Koichi Kinbara, Norimaro Sugimoto, Toshitaka Nakazawa
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Apr 18, 1980
Inventors
Koichi Kinbara
Norimaro Sugimoto
Toshitaka Nakazawa
Assignees (at issue)
Meito Corporation
Toyo Pulp 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.