CH299178A
Expired / Lapsed
CH
⏱️ 0.0 years remaining
A suitable room ventilation device for recovering heat from the exhaust air to preheat the fresh air.
Assignee: Studer Hans
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Filing: 1950-06-19
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Granted: —
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Expires: 1970-06-19
Abstract
No abstract record available.
Inventors
- 👤 Studer Hans
Bibliographic Details
Application Number
—
Jurisdiction
CH
Data Source
google_patents
Last Synchronized
2026-10-31 22:45
CPC Classifications
F; F24; F24F; F24F12/00; F24F12/001; Y; Y02; Y02B; Y02B30/00; Y02B30/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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