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公开(公告)号:US3541267A
公开(公告)日:1970-11-17
申请号:US3541267D
申请日:1967-04-10
申请人: NIPPON TELEGRAPH & TELEPHONE , FUJITSU LTD , OKI ELECTRIC IND CO LTD , NIPPON ELECTRIC CO , HITACHI LTD
发明人: FUKUTOMI REIJIRO , SAITO YOSHIHIRO , NISHIMURA SHOZO , YAMASHITA KOJI , INOUE SOICHI , IWASAKI MIKIO , ASHIHARA KAZUO , KONDO TAKESHI , HIRAGI SADAYUKI , ITOH KAZUO , HORI YOSHIAKI , OZAWA YUKIO
CPC分类号: H04Q3/0004