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发明名称
Protective device for control circuit of electric phonograph or the like
摘要
申请公布号
US1924619(A)
申请公布日期
1933.08.29
申请号
US19310508643
申请日期
1931.01.14
申请人
MILLS NOVELTY COMPANY
发明人
MILLS BERT E.
分类号
G07F17/30
主分类号
G07F17/30
代理机构
代理人
主权项
地址
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