Document Type and Number:
Japanese Patent JPS5020561
Kind Code:
Y1
Application Number:
JP8172971U
Publication Date:
June 21, 1975
Filing Date:
September 10, 1971
Export Citation:
International Classes:
H04Q1/20; H04Q3/42; H04Q3/72; H04Q5/02; (IPC1-7): H04Q3/42; H04Q5/02