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• Incandescent light bulb
  ...Lodyguine and applied and obtained patents for incandescent lamps having [[chromium]], [[iridium]], [[rhodium]], [[ruthenium]], [[osmium]], [[molybdenum]] and ...ss]] with a [[dopant]]; which is often a metal like [[cobalt]] (blue) or [[chromium]] (green).<ref>{{cite web|url=http://www.geconsumerandindustrial.com/enviro
  104 KB (15,285 words) - 16:44, 16 December 2018