Granted Patent
Utility
US 4,289,847 · App. 06/170,770
Method of forming dye image
Inventors:
Wataru Ishikawa, Mitsuto Fujiwhara, Tamotsu Kojima, Takaya Endo, Katsunori Kato
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jul 21, 1980
Inventors
Wataru Ishikawa
Mitsuto Fujiwhara
Tamotsu Kojima
Takaya Endo
Katsunori Kato
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.