Document Type and Number:
Japanese Patent JPS5218112
Kind Code:
Y2
Application Number:
JP11916871U
Publication Date:
April 23, 1977
Filing Date:
December 16, 1971
Export Citation:
International Classes:
H04R3/00; G11B5/00; G11B20/02; H04R1/04; (IPC1-7): G11B1/00; G11B5/033; H04R1/04