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AT147004B
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AT
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Device for filtering out the low-frequency sound in high-frequency telegraphy.
Assignee: Lorenz C Ag
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Filing: 1935-01-14
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Granted: 1936-09-25
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Expires: 1955-01-14
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
AT
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google_patents
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2026-10-26 21:46
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