April 19: Yahtzee!

On this date in History .... 1956:

Toy and game entrepreneur Edwin S. Lowe filed Yahtzee as a trademark with the U.S. Patent Office. 

The game did not initially do well commercially. Eventually, he had the idea of organizing Yahtzee parties so people could play the game and get a firsthand appreciation of it. The idea was successful, and enthusiasts quickly popularized the game through word of mouth.

Over 50 million of the Yahtzee dice games are sold each year.