Patent US2165028A successfully refreshed from Google Patents.
DE673045C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Breathing valve, especially for gas masks
Assignee: BERNH DRAEGER
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Filing: 1933-09-10
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Granted: 1939-03-15
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Expires: 1953-09-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; F16K15/028
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