Granted Patent
Utility
US 4,510,513 · App. 06/513,344
Heat sensitive record sheet
Inventors:
Masahiko Yamaguchi, Michihiro Gonda, Yutaka Satoh, Mikiko Kanasugi
Patented Case
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Granted: Apr 9, 1985
Filed: Jul 13, 1983
Inventors
Masahiko Yamaguchi
Michihiro Gonda
Yutaka Satoh
Mikiko Kanasugi
Assignee (at issue)
Hodogaya Chemical 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.