Document Type and Number:
Japanese Patent JPS5631107
Kind Code:
Y2
Application Number:
JP5678377U
Publication Date:
July 24, 1981
Filing Date:
May 06, 1977
Export Citation:
International Classes:
H04R1/02; G01H1/00; G01H3/00; H04R1/08; (IPC1-7): H04R1/02; G01H1/00