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Publication of FR554863ApublicationCriticalpatent/FR554863A/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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FR554863D1922-08-081922-08-08Panneaux transparents pour l'éclairage
ExpiredFR554863A
(fr)