Document Type and Number:
Japanese Patent JPS50137604
Kind Code:
A
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Application Number:
JP4398974A
Publication Date:
October 31, 1975
Filing Date:
April 19, 1974
Export Citation:
International Classes:
H04M1/00; H04M3/02; H04M5/12; (IPC1-7): H04M3/02; H04M5/12