Granted Patent
Utility
US 4,576,793 · App. 06/527,681
Analytical element
Inventors:
Mikio Koyama, Kenichiro Okaniwa, Masakuni Saruhashi
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Aug 29, 1983
Inventors
Mikio Koyama
Kenichiro Okaniwa
Masakuni Saruhashi
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.