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FR428629A
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Lighting method based on the action of electric current on phosphorescent materials that may or may not be radium-bearing in an atmosphere of rarefied gas, and devices implementing this method
Assignee: BANQUE DU RADIUM
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Filing: 1910-06-25
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Granted: 1911-09-04
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Expires: 1930-06-25
Abstract
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FR
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google_patents
Last Synchronized
2026-11-02 20:43
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/54; H01J61/545
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