Patent CA457798A successfully refreshed from Google Patents.
CA457798A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Ventilating device
Assignee: Individual
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Filing: —
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Granted: 1949-07-05
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Expires: 1966-07-05
Abstract
No abstract record available.
Inventors
- 👤 Charles Stewart Frederick
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-25 15:23
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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