| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 165 | INSULATORS;  With insulator-supporting or attaching means;  Support penetrating;  Penetrating element socketed in insulator; | 
  | Class: | 29 | METAL WORKING | 
  | Subclass: | 887 | METHOD OF MECHANICAL MANUFACTURE;  Electrical device making;  Insulator making; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 161R | INSULATORS;  With insulator-supporting or attaching means;  Adjustably or movably mounted; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 175 | INSULATORS;  With conductor holding means;  Insulator structure;  Self-retaining; | 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS | 
  | Subclass: | 211 | INSULATORS;  With moisture or dirt removing or shedding; |