The musical instrument pickups, effects units and amplifiers designed and manufactured
by Harry DeArmond and Bud Rowe and later by Steve Tosh in Toledo, Ohio, from the 1940s to the 1980s, through Rowe Industries Inc.,
H. N. Rowe & Company, Rowe DeArmond Inc., DeArmond Inc. and Tosh Electronics, all of Toledo, Ohio, USA.

Guitar & bass pickups

Pickups 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.