| Patent information: 
  | Patent: | Utility 608,906 |  | Patented: | August 9, 1898 |  | Applied: | June 22, 1898 |  | Title: | Insulation of Electric Wires |  | Description: | Uses glass tube sealed from the weather to allow conductor to enter a building (see reissue 11,759)) |  | Category: | Wall Tube |  | Assigned to: |  |  Patentee Information: Class and subclass information: 
  | Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |  | Subclass: | 153R | INSULATORS;  Through wall or plate;  Bushing type;  Opposed wall engaging means; |  Known specimens: | Drawings: 
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