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公开(公告)号：US1352602A
公开(公告)日：1920-09-14
申请号：US27121919
申请日：1919-01-15
Applicant: SONORA PHONOGRAPH COMPANY INC
Inventor： JOHN HERZOG
IPC: E05C17/08
CPC classification number: E05C17/085
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公开(公告)号：US1397733A
公开(公告)日：1921-11-22
申请号：US27936719
申请日：1919-02-26
Applicant: SONORA PHONOGRAPH COMPANY INC
Inventor： JOHN HERZOG
IPC: G10K13/00
CPC classification number: G10K13/00
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