Patent information:
| Patent: | Utility 450,384 |
| Patented: | April 14, 1891 |
| Applied: | December 12, 1890 |
| Title: | Electric Wire Insulator |
| Description: | Knob with two grooves and side petticoat |
| Category: | Knob |
| Assigned to: |
Patentee Information:
| BERTOLETTE, Daniel A. | Norristown, PA |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 166R | INSULATORS; With insulator-supporting or attaching means; Support penetrating; Through aperture, penetrating element clamped; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 174 | INSULATORS; With conductor holding means; Insulator structure; |
Known specimens:
| None known |
Drawings:
Page 1 |