Patent DE446183C successfully refreshed from Google Patents.
DE446183C
Expired / Lapsed
DE
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Electric headlamp for miners
Assignee: Friemann and Wolf GmbH
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Filing: 1923-09-06
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Granted: 1927-06-25
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Expires: 1943-09-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 16:08
CPC Classifications
A; A42; A42B; A42B1/00; A42B1/24; A42B1/242; A42B1/244; F; F21; F21L; F21L14/00; F21L4/00; F21V; F21V25/00; F21V25/02; G; G09; G09F; G09F21/00; G09F21/02
Claims Analysis
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References Cited (Backward Citations)
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