Granted Patent
Utility
US 4,390,617 · App. 06/240,806
Method for the formation of photographic images
Inventors:
Kenichiro Okaniwa, Toyoaki Masukawa, Kiyoshi Yamashita, Wataru Ishikawa
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: Mar 5, 1981
Inventors
Kenichiro Okaniwa
Toyoaki Masukawa
Kiyoshi Yamashita
Wataru Ishikawa
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.