Document Type and Number:
Japanese Patent JPS6367704
Kind Code:
B2
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Inventors:
USHIJIMA KUNIO
Application Number:
JP19731081A
Publication Date:
December 27, 1988
Filing Date:
December 08, 1981
Export Citation:
Assignee:
HITACHI LTD
International Classes:
G07C15/00; G06Q50/00; G06Q50/10; G06Q50/34