Document Type and Number:
Japanese Patent JPS567953
Kind Code:
Y2
Application Number:
JP4169176U
Publication Date:
February 21, 1981
Filing Date:
April 05, 1976
Export Citation:
International Classes:
H04R1/02; G03B31/00; (IPC1-7): G03B31/00; H04R1/02
Next Patent: JPS567954