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发明名称
Improvements in or relating to electromagnetic vibrators
摘要
申请公布号
GB331580(A)
申请公布日期
1930.07.07
申请号
GB19290010618
申请日期
1929.04.05
申请人
AUTOMATIC TELEPHONE MANUFACTURING COMPANY LIMITED;SIDNEY REYNELL SMITH;THOMAS PHILIP PREIST
发明人
分类号
H04M19/02
主分类号
H04M19/02
代理机构
代理人
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地址
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