In 1975, I invented and made a dice rolling box that was made of Lexan and was sealed. It had pins inside that the dice would tumble thru. Your turn was over when you inverted the box and handed it to the other person. No more dice problems or arguments. I rolled 1000 times to check the bell curve. It was perfect. I didn't patient it because I thought random number generators were coming soon. I read Jacoby's books.