Granted Patent
Utility
US 4,891,296 · App. 07/044,947
Pattern transfer method and silver halide photographic plate to be used for said method
Inventors:
Shigeru Tsurukiri, Hiroshi Sugita, Toshio Yamamoto, Masaru Kawasaki, Eiji Horie
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Apr 30, 1987
Inventors
Shigeru Tsurukiri
Hiroshi Sugita
Toshio Yamamoto
Masaru Kawasaki
Eiji Horie
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.