I want to know the answer to the following question:
What type of gas fills a tungsten filament bulb?
All the background I'm provided with is that "On 13 December 1904, Hungarian Sándor Just and Croatian Franjo Hanaman were granted a Hungarian patent (No. 34541) for a tungsten filament lamp that lasted longer and gave brighter light than the carbon filament.". Is that enough to answer the question?
Answer: no