When were flashlights invented?

I’m talking common cylindrical ones available in the home.

I just saw the movie Road to Perdition, and the kid supposedly had one in 1931. It struck me that flashlights weren’t around yet, but I can’t find info about it. And I could easily be wrong.

Google, “flashlight history”


Thanks. I had done so, but I threw in some other word, which I can’t recall now, and I got a zillion hits, and the first page of links was no help.

Anyway, I was wrong again!