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发明名称
Telephone ringer
摘要
申请公布号
US2607833(A)
申请公布日期
1952.08.19
申请号
US19470792373
申请日期
1947.12.18
申请人
STROMBERG-CARLSON COMPANY
发明人
SCHOMAKER GEORGE W.
分类号
G10K1/062
主分类号
G10K1/062
代理机构
代理人
主权项
地址
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