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发明名称
Producing musical sounds
摘要
申请公布号
US1848222(A)
申请公布日期
1932.03.08
申请号
US19290366866
申请日期
1929.05.29
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
POTTER RALPH K.
分类号
G10H3/06
主分类号
G10H3/06
代理机构
代理人
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