Document Type and Number:
Japanese Patent JPS57119997
Kind Code:
U
Application Number:
JP719781U
Publication Date:
July 26, 1982
Filing Date:
January 20, 1981
Export Citation:
International Classes:
H04R17/00; G10K9/12; H04R7/02; (IPC1-7): H04R17/00; G10K9/12; H04R7/02