Granted Patent
Utility
US 5,399,196 · App. 08/099,129
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Inventors:
Kunihiko Ichikawa, Takefumi Yoshikawa
Patented Case
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Granted: Mar 21, 1995
Filed: Jul 29, 1993
Inventors
Kunihiko Ichikawa
Takefumi Yoshikawa
Assignee (at issue)
Mitsubishi Kasei Corporation
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.