Complex sentence: These instruments are sometimes referred to as "Dobro mandolins," after pioneering instruments designed and produced by the Dopyera Brothers, which evolved into a brand name; however the brand name "Dobro" is currently the property of the Gibson Guitar Corporation.
Split into simpler sentences: These instruments are sometimes referred to as "Dobro mandolins," after pioneering instruments designed and produced by the Dopyera Brothers, which evolved into a brand name. The brand name "Dobro" is currently the property of the Gibson Guitar Corporation.