Complex sentence: Emil Dopyera (also known as Ed Dopera) manufactured Dobros from 1959 under the brand name Dopera's Original before selling the company and name to Semie Moseley, who merged it with his Mosrite guitar company and manufactured Dobros for a time.
Split into simpler sentences: Emil Dopyera (also known as Ed Dopera) manufactured Dobros from 1959 under the brand name Dopera's Original before selling the company and name to Semie Moseley. Moseley merged it with his Mosrite guitar company and manufactured Dobros for a time.