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FR402575A
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Wear-resistant diaphragm for talking machines
Assignee: G BALLU ET CIE SOC
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Filing: 1909-04-29
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Granted: 1909-10-12
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Expires: 1929-04-29
Abstract
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Inventors
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Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/44; G11B3/46
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