Document Type and Number:
Japanese Patent JPS5723992
Kind Code:
Y2
Application Number:
JP17898975U
Publication Date:
May 24, 1982
Filing Date:
December 26, 1975
Export Citation:
International Classes:
H04R13/00; G04C21/00; G04C21/02; G04C21/12; H04R11/02; (IPC1-7): H04R13/00; G04C21/12