Thanks. As usual, I invent things after they've been invented. My curse. I have quite a list of 'inventions' that turn out to have already been invented; if they had not, I suspect I would be rich.
At 14, I "invented" (in my head only, alas) the Compact Disc. I discovered "Fredkin's Number" before Fredkin. The difference was that he published and I did not!...etc. Sigh.
--Boris
Yep, I do the same thing. Once I 'invented' a talking can. Suppose you opened a winning can and it said, "you Won!" or a you opened a can of bug poison and it warned: "Poison do not drink"
I was only two years behind the patent filing date.