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公开(公告)号：US1701911A
公开(公告)日：1929-02-12
申请号：US11977726
申请日：1926-06-30
Applicant: GEN TALKING PICTURES CORP
Inventor： DE FOREST LEE , LOUIS REYNOLDS JOHN
IPC: H03G9/06
CPC classification number: H03G9/06
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