Document Type and Number:
Japanese Patent JPS4110420
Kind Code:
Y1
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Application Number:
JP1505664U
Publication Date:
May 18, 1966
Filing Date:
February 28, 1964
Export Citation:
International Classes:
G03B27/32; G03B27/60; G03F7/20; (IPC1-7): G03B27/60; G03F7/20