Document Type and Number:
Japanese Patent JPS5462730
Kind Code:
U
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Application Number:
JP13591277U
Publication Date:
May 02, 1979
Filing Date:
October 12, 1977
Export Citation:
International Classes:
G03B21/00; G02B5/20; G03B21/132; (IPC1-7): G03B21/00; G02B5/20