Document Type and Number:
Japanese Patent JPS51147426
Kind Code:
U
Application Number:
JP6823375U
Publication Date:
November 26, 1976
Filing Date:
May 20, 1975
Export Citation:
International Classes:
G03B21/54; G03B23/02; G11B23/08; G11B23/087; (IPC1-7): G11B23/08; G03B23/02