Document Type and Number:
Japanese Patent JPS50137606
Kind Code:
A
Application Number:
JP4488674A
Publication Date:
October 31, 1975
Filing Date:
April 20, 1974
Export Citation:
International Classes:
H04Q1/45; H04L27/26; H04Q1/44; (IPC1-7): H04Q1/44
Domestic Patent References:
JPS4879909A | 1973-10-26 |