Document Type and Number:
Japanese Patent JPS4888012
Kind Code:
U
Application Number:
JP1010972U
Publication Date:
October 24, 1973
Filing Date:
January 25, 1972
Export Citation:
International Classes:
G03B31/06; G03B31/00; G11B23/44; (IPC1-7): G11B23/48; G03B31/00