1743
Can you think of any now?
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A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

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Can it even be said that it was perfected when later we switched from carbon filament to tungsten, and from there to halogen-surrounded tungsten.
And on the other side, Edison's lamp wasn't even the first one to be mass produced and commercially sold.
There's a certain style of education that really wants to draw a hard line between "before the thing" and "after the thing", and credit its invention to a single guy. But really the line is quite wide and fuzzy.