Who is invented for tungsten filament
In 1913, Milan invented the power of large, long life, high efficiency inflatable tungsten bulb.
On December 18, 1878, the British scientist Joseph Swan at the meeting of the Newcastle Institute of Chemistry in New Orleans, demonstrated a very fine carbon wire placed in the vacuum tube of the lamp.
October 21, 1879, Edison produced the world's first only practical value of the lights.
