Rio Grande Pickups was founded in 1993 by John "Bart" Wittroc. Bart had been repairing and dealing in vintage guitars since 1972, and is an active member of the vintage guitar show scene. He first started winding electic guitar pickups around 1978 as part of his vintage guitar restoration work. He aims to capture the tone and feel of the vintage pickups, from strat to tele single coils, up to Humbucking, but with the option of higher output and greater tonal variations.
Dimitar Georgiev, alongside two of his brothers, founded Kremona in 1924 in Bulgaria. Georgiev had apprenticed as a violin maker in Markneukirchen, Germany. Over time, the brothers welcomed other master builders into the Kremona workshop and Kremona instruments spread across Europe. Circa 2017 Kremona is best known for acoustic guitars, which are widely distributed in the USA, but they also made some electric and bass guitars in the past.