Granted Patent
Utility
US 4,937,047 · App. 07/031,698
Analytical element
Inventors:
Morio Kobayashi, Seiji Hidaka, Takashi Ishihara, Isao Haga, Hiroshi Iwadate
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Mar 27, 1987
Inventors
Morio Kobayashi
Seiji Hidaka
Takashi Ishihara
Isao Haga
Hiroshi Iwadate
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.