Granted Patent
Utility
US 4,774,591 · App. 06/638,565
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Inventors:
Masahiko Matsunawa, Yoshinori Abe
Patented Case
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Granted: Sep 27, 1988
Filed: Aug 7, 1984
Inventors
Masahiko Matsunawa
Yoshinori Abe
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.