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发明名称
Improvements in or relating to inter-communication telephone equipment
摘要
申请公布号
GB730952(A)
申请公布日期
1955.06.01
申请号
GB19500021002
申请日期
1950.08.24
申请人
ERIC ALFRED WILLIAM DYMOND;HENRY JOSEPH LOVEGROVE
发明人
分类号
H04M9/00
主分类号
H04M9/00
代理机构
代理人
主权项
地址
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