Curly invented the Stick Up Bulb (as seen on TV) in this episode
in the scene in the basement, after the lights go out, where he takes the bulb out of the socket and it's still lighted.
I don't remember and can't find a scene in the basement. I'm watching colorized version on youtube
https://www.youtube.com/watch?v=kxhcAXxTjSY.
"Pardon me while I have a strange interlude"- Marx