CH449711A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
Sound reproduction system with volume regulated by the ambient noise
Assignee: Executone Inf Sys Inc
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Filing: 1966-03-16
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Granted: —
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Expires: 1986-03-16
Abstract
No abstract record available.
Inventors
- 👤 B Cohen Abraham
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-11-05 06:49
CPC Classifications
H; H04; H04R; H04R27/00; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/32
Claims Analysis
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References Cited (Backward Citations)
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