Document Type and Number:
Japanese Patent JPS5031730
Kind Code:
Y1
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Application Number:
JP6372970U
Publication Date:
September 16, 1975
Filing Date:
June 25, 1970
Export Citation:
International Classes:
G03C3/00; G03B23/02; G03B31/00; (IPC1-7): G03C3/00; G03B23/02