I have mixed feelings about the "correct" answer. Davy showed that wires glowed when enough current was passed through them. Does that count? Swan improved on that with his lightbulb lasting longer, but a few minutes life is incomplete. Edison finished the invention.
Me, I tend to give the credit for the invention to Edison, while acknowledging that he stood on the shoulders of others. It's how credit is done for most inventions.
Me, I tend to give the credit for the invention to Edison, while acknowledging that he stood on the shoulders of others. It's how credit is done for most inventions.