Victor Insulator Company
The Victor Insulator Company based in Victor, NY (founded 1893 by Fred M. Locke) is the oldest insulator company in North America. They originally made glass insulators for electrical lines. They suspended operations during the Great Depression, but resumed operations in 1935 as Victor Insulators. In 1984, the managers purchased the company from Brown Boveri and resumed operating under the name. They also made diner coffee mugs in the 1940s, 1950s & 1960s  which are considered iconic to diner culture aficionados. They are still making insulators at the same location to this day.
- "Boronizing improves tool life during green finishing," Ceramic Industry: the exclusive global voice of ceramic business and manufacturing. Troy: March 1998.Vol.148, Iss. 3; pg. 26
- February 2004 Porcelain Insulator News