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发明名称
Sound record
摘要
申请公布号
US2273863(A)
申请公布日期
1942.02.24
申请号
US19400332443
申请日期
1940.04.30
申请人
LON-GA-TONE, INC.
发明人
HERZIG LEONARD A.
分类号
G03B31/00;G11B7/00;G11B15/02;G11B15/44
主分类号
G03B31/00
代理机构
代理人
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地址
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