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发明名称
Electric signal bell
摘要
申请公布号
US1749175(A)
申请公布日期
1930.03.04
申请号
US19260154844
申请日期
1926.12.14
申请人
STANLEY & PATTERSON, INC.
发明人
ALBRIGHT FRANK;ELSASSER WILLIAM
分类号
G10K1/064
主分类号
G10K1/064
代理机构
代理人
主权项
地址
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