for guitar and bass include numbered pickups sold to the public through
music outlets and distributors and those produced only for musical
instrument manufacturers including D’Angelico, Deane, Eko, Emmons, Epiphone, Epitome, Fender, Gretsch, Bacon Belmont, Guild, Harmony and their own
brands (Airline, Alden, Barclay, Heathkit, Holiday, Monterey, Regal, Sears Roebuck, Silvertone, Truetone), Hofner, Kustom, Levin, CF Martin,
Messenger, Micro-Frets, Ovation, Premier, Rickenbacker and Standel.