Granted Patent
Utility
US 4,288,521 · App. 06/115,122
Process for the production of photosensitive plates for printing
Inventors:
Hiroshi Kojima, Kunio Ito, Masami Akiyama, Takeshi Tanaka
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Jan 24, 1980
Inventors
Hiroshi Kojima
Kunio Ito
Masami Akiyama
Takeshi Tanaka
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.