Document Type and Number:
Japanese Patent JPS53163124
Kind Code:
U
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Application Number:
JP6770377U
Publication Date:
December 20, 1978
Filing Date:
May 27, 1977
Export Citation:
International Classes:
G03B1/42; G03B1/00; G03B9/08; G03B9/66; G03B9/68; G03B17/00; G03B17/26; G03B17/42; (IPC1-7): G03B1/00; G03B1/42; G03B9/08