FR1133358A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Balanced Armature Electromagnetic Telephone Receivers
Assignee: Societe des Telephones Ericsson SA
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Filing: 1955-03-11
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Granted: 1957-03-26
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Expires: 1975-03-11
Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-03 15:35
CPC Classifications
H; H04; H04R; H04R11/00; H04R11/06
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