Document Type and Number:
Japanese Patent JPS49103446
Kind Code:
U
Application Number:
JP21673U
Publication Date:
September 05, 1974
Filing Date:
December 26, 1972
Export Citation:
International Classes:
G03B17/26; G11B15/66; (IPC1-7): G11B23/10; G03B23/00; G03B23/02