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Forges et Ateliers de Constructions Electriques de Jeumont SA
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Forges et Ateliers de Constructions Electriques de Jeumont SA
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Application filed by Forges et Ateliers de Constructions Electriques de Jeumont SAfiledCriticalForges et Ateliers de Constructions Electriques de Jeumont SA
Application grantedgrantedCritical
Publication of FR817059ApublicationCriticalpatent/FR817059A/fr
F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V5/00—Refractors for light sources
F21V5/04—Refractors for light sources of lens shape
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Engineering & Computer Science
(AREA)
General Engineering & Computer Science
(AREA)
FR817059D1936-04-271936-04-27Perfectionnement aux systèmes optiques pour signaux lumineux
ExpiredFR817059A
(fr)