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H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
H01K3/02—Manufacture of incandescent bodies
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FR453568D1912-01-261913-01-24Procédé de fabrication de corps éclairants ductiles principalement de tungstène pour lampes électriques à incandescence
ExpiredFR453568A
(fr)