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DE368288C Expired / Lapsed DE ⏱️ 0.0 years remaining

Device for the execution of the method for controlling electrical currents by sound forces

Assignee: Individual
•
Filing: 1921-05-19
•
Granted: 1923-02-06
•
Expires: 1941-05-19
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Abstract

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Inventors

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Bibliographic Details

Application Number —
Jurisdiction DE
Data Source google_patents
Last Synchronized 2026-11-01 22:14
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/004

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