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.
The Emmons company,
manufacturers of pedal steel guitars, commissioned DeArmond to produce a
special version of their Model 41 pickup embossed with the Emmons logo. At 4.25 Inches (108mm.) wide, it is considerably wider than the regular model 41.