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HERMANN WILHELM WUEPPERMANN EN
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HERMANN WILHELM WUEPPERMANN EN
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Application filed by HERMANN WILHELM WUEPPERMANN ENfiledCriticalHERMANN WILHELM WUEPPERMANN EN
Application grantedgrantedCritical
Publication of FR418952ApublicationCriticalpatent/FR418952A/fr
F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V3/00—Globes; Bowls; Cover glasses
F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
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Engineering & Computer Science
(AREA)
General Engineering & Computer Science
(AREA)
FR418952A1910-07-251910-07-25Procédé et dispositif pour la répartition uniforme de la lumière dans les installations d'éclairage
ExpiredFR418952A
(fr)