Document Type and Number:
Japanese Patent JPS4854807
Kind Code:
A
Application Number:
JP8917671A
Publication Date:
August 01, 1973
Filing Date:
November 09, 1971
Export Citation:
International Classes:
H04M3/42; H04M3/60; H04Q3/58; H04Q3/62; (IPC1-7): H04Q3/62