Granted Patent
Utility
US 4,255,515 · App. 05/959,592
Photographic films
Inventors:
Toshiaki Shibue, Koichi Nagayasu, Masayoshi Mayama, Masao Ishihara, Naoto Abe
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Nov 13, 1978
Inventors
Toshiaki Shibue
Koichi Nagayasu
Masayoshi Mayama
Masao Ishihara
Naoto Abe
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.