Document Type and Number:
Japanese Patent JPS5319069
Kind Code:
Y2
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Application Number:
JP10940673U
Publication Date:
May 20, 1978
Filing Date:
September 18, 1973
Export Citation:
International Classes:
G03B7/085; G03B7/12; G03B9/58; G03B17/18; (IPC1-7): G03B7/12