Granted Patent
Utility
US 4,615,983 · App. 06/319,391
Immunological measuring element
Inventor:
Mikio Koyama
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Nov 9, 1981
Inventor
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.