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发明名称
Process for producing sound films and matrix therefor
摘要
申请公布号
US2274570(A)
申请公布日期
1942.02.24
申请号
US19400335194
申请日期
1940.05.14
申请人
HUGO WESTERKAMP
发明人
WESTERKAMP HUGO
分类号
B29C59/04
主分类号
B29C59/04
代理机构
代理人
主权项
地址
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