Document Type and Number:
Japanese Patent JPS558034
Kind Code:
Y2
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Application Number:
JP320972U
Publication Date:
February 22, 1980
Filing Date:
December 28, 1971
Export Citation:
International Classes:
G03B23/00; G06K17/00; (IPC1-7): G06F15/40; G03B23/00; G06K17/00
Next Patent: JPS558035