Patent DE331099C successfully refreshed from Google Patents.
DE331099C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Air purification insert with filter air duct for breathing apparatus to rescue from danger of suffocation
Assignee: ALEXANDER BERNHARD DRAEGER DR
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Filing: —
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Granted: 1920-12-30
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Expires: 1937-12-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-02 22:21
CPC Classifications
A; A62; A62B; A62B19/00
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Total Claims: 0
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