Document Type and Number:
Japanese Patent JPS5174508
Kind Code:
A
Inventors:
TAWARA YOSHINORI
CHIKIRA HIROSHI
CHIKIRA HIROSHI
Application Number:
JP14807074A
Publication Date:
June 28, 1976
Filing Date:
December 25, 1974
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04Q3/78; H04Q1/30; (IPC1-7): H04Q1/30