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FR766483A
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Improvements to electro-acoustic translator devices
Assignee: Electrical Research Products Inc
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Filing: 1934-01-04
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Granted: 1934-06-28
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Expires: 1954-01-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-06 09:28
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/20; H04R1/00; H04R1/20; H04R1/22; H04R1/26
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