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Publication of FR652507ApublicationCriticalpatent/FR652507A/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
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Engineering & Computer Science
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General Engineering & Computer Science
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FR652507D1928-02-141928-02-14Diffuseur pour éclairage électrique
ExpiredFR652507A
(fr)