FR890345A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Improvements to amplifier systems with several electronic tubes
Assignee: Telefunken AG
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Filing: 1943-01-25
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Granted: 1944-02-04
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Expires: 1963-01-25
Abstract
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Inventors
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Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-03 00:45
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/08; H03F1/18; H03F1/20
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