Document Type and Number:
Japanese Patent JPS5144769
Kind Code:
B1
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Application Number:
JP4015771A
Publication Date:
November 30, 1976
Filing Date:
June 09, 1971
Export Citation:
International Classes:
H04H20/14; H04H20/31; H04H60/37; H04H1/00; H04H7/00; (IPC1-7): H04N7/02; H04H9/00