Document Type and Number:
Japanese Patent JPS5142350
Kind Code:
Y2
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Application Number:
JP9020771U
Publication Date:
October 15, 1976
Filing Date:
October 04, 1971
Export Citation:
International Classes:
G03B23/02; G11B23/06; G11B23/44; (IPC1-7): G11B23/06; G03B23/02