Document Type and Number:
Japanese Patent JPS57113557
Kind Code:
U
Application Number:
JP19047380U
Publication Date:
July 14, 1982
Filing Date:
December 29, 1980
Export Citation:
International Classes:
H04Q1/30; H04B1/00; H04L13/18; H04L27/26; H04Q9/12; (IPC1-7): H04L27/26; H04B1/00; H04L13/18; H04Q1/30; H04Q9/12