Patent US2372265A successfully refreshed from Google Patents.
Patent DE661740C successfully refreshed from Google Patents.
DE661740C
Expired / Lapsed
DE
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Method for producing a sealing frame for gas protective masks
Assignee: Draegerwerk AG and Co KGaA
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Filing: —
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Granted: 1938-06-25
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Expires: 1955-06-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-03 14:18
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0064; B29D99/0071; B29L; B29L2031/00; B29L2031/48; B29L2031/4807; B29L2031/4835
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References Cited (Backward Citations)
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