| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 150 | INSULATORS;  Multiple insulator assemblies;  Strings and stacks; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 158R | INSULATORS;  With insulator-supporting or attaching means; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 169 | INSULATORS;  With conductor holding means;  Fitting or terminal type; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 182 | INSULATORS;  With terminal elements;  Plural;  Cap and pin; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 188 | INSULATORS;  With terminal elements;  Cap type; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 209 | INSULATORS;  Sectional, multi-part, composite, or coated; |