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Publication of FR509153ApublicationCriticalpatent/FR509153A/en
F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
F21V19/00—Fastening of light sources or lamp holders
Landscapes
Engineering & Computer Science
(AREA)
General Engineering & Computer Science
(AREA)
FR509153A1920-01-271920-01-27
Lamp holder for electric projector
ExpiredFR509153A
(en)