Granted Patent
Utility
US 4,267,266 · App. 06/062,804
Photographic films
Inventors:
Toshiaki Shibue, Koichi Nagayasu
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Aug 1, 1979
Inventors
Toshiaki Shibue
Koichi Nagayasu
Assignee (at issue)
Konishiroku Photo Industry 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.