Document Type and Number:
Japanese Patent JPS51154539
Kind Code:
U
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Application Number:
JP7458475U
Publication Date:
December 09, 1976
Filing Date:
June 02, 1975
Export Citation:
International Classes:
G03B21/64; G03B21/00; G03B23/02; (IPC1-7): G03B21/00; G03B21/64