FR831978A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Loudspeaker with a sound-diffusing element
Assignee: Koninklijke Philips NV
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Filing: 1938-01-12
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Granted: 1938-09-16
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Expires: 1958-01-12
Abstract
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Inventors
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Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-05 02:07
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/345
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