Document Type and Number:
Japanese Patent JPS57109683
Kind Code:
U
Application Number:
JP18684880U
Publication Date:
July 06, 1982
Filing Date:
December 25, 1980
Export Citation:
International Classes:
H04R1/02; (IPC1-7): H04R1/02
Domestic Patent References:
JPS4024961Y1 | ||||
JP49126844B |