Akai
AKG
JBL, EV, B&W, Klipsch, Paradigm, Yamaha, Bryston, Panasonic (including Teac, Tascam and Technics products), Carver, Crown, MeyerSound, Roland, Mogami, dw, Kurzweil, Gibson, Fender, Taylor, M-Audio, DBx, Behringer, Furman, Shure, AudioTechnica, Zildigan...
Perhaps I should've listed everything alphabetically, but you got an idea...