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经营范围
发明名称
ISDN TERMINAL EQUIPMENT
摘要
申请公布号
JPH05122394(A)
申请公布日期
1993.05.18
申请号
JP19910305635
申请日期
1991.10.25
申请人
RICOH CO LTD
发明人
SHOBU TOSHIBUMI
分类号
H04L29/12;H04L12/02;H04M1/00;H04M1/253;H04M11/00;H04N1/00
主分类号
H04L29/12
代理机构
代理人
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