Fernico is an alloy of Iron (Fer), Nickel (Ni) and Cobalt (Co). The abbreviations form the name which is (or was) a trademark. The alloy has the same linear coefficient of expansion of certain types of glass, and thus makes an ideal material for the lead out wires in light bulbs and thermionic valves. General Name, Symbol, Number iron, Fe, 26 Chemical series transition metals Group, Period, Block 8, 4, d Appearance lustrous metallic with a grayish tinge Atomic mass 55. ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10, 4, d Appearance lustrous, metallic and silvery with a gold tinge Atomic mass 58. ... This article or section does not cite its references or sources. ... A trademark, trade mark, ™ or ®[1] is a distinctive sign of some kind which is used by an organization to uniquely identify itself and its products and services to consumers, and to distinguish the organization and its products or services from those of other organizations. ... The light bulb is one of the most significant inventions in the history of the human race, illuminating the darkness of the evening and bringing light indoors at all times in order focus on the task at hand. ... In electronics, a vacuum tube (American English) or (thermionic) valve (British English) is a device generally used to amplify a signal. ...

Cunife exhibits a similar property. Cunife is an alloy of copper (Cu), nickel (Ni) and iron (Fe). ...