Mordecai Meirowitz (born c. 1922-1927 in Romania) was an Israeli postmaster and telecommunications expert.Meirowitz invented the code-breaking board game Master Mind. After being rejected by leading games companies, he sparked the interest of a Leicester-based company, Invicta Plastics, which restyled and renamed the game.Released in 1971, the game sold over 50 million sets in 80 countries, making it the most successful new game of the 1970s.