Granted Patent
Utility
US 4,770,979 · App. 06/874,791
Developer composition
Inventors:
Shigeharu Koboshi, Toshifumi Iijima, Hiroshi Yamazaki
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Jun 13, 1986
Inventors
Shigeharu Koboshi
Toshifumi Iijima
Hiroshi Yamazaki
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.