Document Type and Number:
Japanese Patent JPS5012350
Kind Code:
Y1
Application Number:
JP1097168U
Publication Date:
April 16, 1975
Filing Date:
February 15, 1968
Export Citation:
International Classes:
G03B23/02; G03B1/00; G03B31/00; G11B23/04; G11B23/44; G11B31/00; (IPC1-7): G11B23/04; G03B1/00; G03B31/00; G11B31/00