Patent DE721802C successfully refreshed from Google Patents.
DE721802C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Device for soundproofing rooms
Assignee: Telefunken AG
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Filing: 1936-02-13
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Granted: 1942-07-22
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Expires: 1956-02-13
Abstract
No abstract record available.
Inventors
- 👤 Dr Hugo Lichte
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 16:23
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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