Tucker & Vinton, Vault Lights.
United Building Material Company, Cement.
Electrical Department
L. B. Stillwell, Electrical Director.
Electric plant for generation, transmission, conversion, and distribution of power, third rail construction, electrical car equipment, lighting system, fire and emergency alarm systems:
American Steel & Wire Company, Cable.
Bajohr, Carl, Lightning Rods.
Broderick & Company, Contact Shoes.