The new trivia thread.

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dunno if it's the answer you're looking for, but I remember seeing him in an episode of Andy Griffith Show circa 1967..it was a courtroom scene

Correct, This is the scene where Aunt Bea and Oppie are about to enter the room with a tray and home made cookies.
 
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* Ask for hints in the form of a question.
 
Was it the incandescent light bulb?

That is not the answer, this is something that he improved but nobody wanted to use his version, yet it was cheaper, better built and many can be built quickly. Incandescent light bulbs were used by everyone until the swirely fluorescent bulbs came along.