SAN DIEGO, Calif. — Medical Marijuana, Inc. (MJNA), a leading cannabis and hemp industry innovator, is pleased to pre-announce its fourth quarter earnings. The company earned net income of approximately $ 5.52 million on gross revenues of $ 8.45 million for the quarter ended March 31, 2013. This represents a gross revenue increase of over $ 3.35 million when compared to the prior quarter ended December 31, 2012. When compared to the same quarter ended March 31, 2012 this represents revenue increase of $ 6.68 million.