Patent DE640324C successfully refreshed from Google Patents.
DE640324C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Housing for electropneumatic loudspeaker
Assignee: Individual
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Filing: —
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Granted: 1936-12-30
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Expires: 1953-12-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-25 22:05
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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