Oldenburg Group Inc, 3600 Lake Shore Ln, Rhinelander, WI 54501, US

Johnson Electric Coil Company is a designer and manufacturer of custom transformers and conductors. The company, which includes a team of three engineers with more than 80 combined years of service in the industry, provides single- and three-phase transformers. It also has the capabilities to handle unusual transformers, such as specialized water-cooled, co-axial transformers, epoxy cast high voltage transformers, and high frequency transformers. Johnson Electric Coil Company is based in Antigo, Wis., and employs more than 80 people.