Tungsram
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Tungsram is a Hungarian manufacturer of light bulbs and vacuum tubes since 1896. It is now a subsidiary of General Electric and its name is used as a brand name only.
This company announced the patent for electric bulbs with a tungsten filament in 1903. Later in 1934, they also announced a patent for Imre Bródy's electric bulb filled with krypton. Both provide longer lifetime for electric bulbs.
The name Tungsram is a portmanteau of "tungsten" (ˈtʌŋstən) and "wolfram" (/ˈwʊlfrəm/), as tungsten is called in German and many other languages, the name of the metal used for making the filaments.
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