Document Type and Number:
Japanese Patent JPS63157752
Kind Code:
U
Application Number:
JP4990787U
Publication Date:
October 17, 1988
Filing Date:
April 03, 1987
Export Citation:
International Classes:
G03B27/50; G03G15/00; G03G15/04; (IPC1-7): G03G15/00; G03B27/50; G03G15/04
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