Document Type and Number:
Japanese Patent JPS4933832
Kind Code:
U
Application Number:
JP7407472U
Publication Date:
March 25, 1974
Filing Date:
June 24, 1972
Export Citation:
International Classes:
G03B23/02; G03B31/00; G11B5/86; (IPC1-7): G11B5/86; G03B31/00