 In 1980 he also launched the Jackson brand with the Randy Rhoads model.Although Jackson and Charvel Guitars became popular with the rise of hard rock and heavy metal music in that era, Grover Jackson sold the Jackson/Charvel brand to the Japanese manufacturer IMC (International Music Corporation) of Fort Worth, Texas, in 1989, and eventually left the company in 1990.From 1993 to 1996, Jackson worked for Washburn USA in Chicago.