Question: Who founded this American guitar manufacturer headquartered in Maryland that produced electric baritone guitars?
Sentence (from "Baritone guitar"): Gretsch, Fender, Gibson, Ibanez, ESP Guitars, PRS Guitars, Music Man, Danelectro, Schecter, Jerry Jones Guitars, Burns London and many other companies have produced electric baritone guitars since the 1960s, although always in small numbers due to low popularity.
Relevant evidence: Yes