Granted Patent
Utility
US 4,594,224 · App. 06/597,818
Analytical element
Inventors:
Kenichiro Okaniwa, Shozo Kikugawa, Mikio Koyama
Patented Case
View Patent ↗
Granted: Jun 10, 1986
Filed: Apr 9, 1984
Inventors
Kenichiro Okaniwa
Shozo Kikugawa
Mikio Koyama
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.