FR640249A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Protective glass device resistant to firedamp and explosions, for lamps or bodies illuminating by electricity
Assignee: Schanzenbach & Co GmbH
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Filing: 1927-08-29
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Granted: 1928-07-09
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Expires: 1947-08-29
Abstract
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Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-28 19:36
CPC Classifications
F; F21; F21V; F21V25/00; F21V25/12
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