Patent information:
| Patent: | Utility 724,329 |
| Patented: | March 31, 1903 |
| Applied: | June 17, 1902 |
| Title: | Insulator |
| Description: | Self-tying nail-knob with three flanges on top for tying wire around the knob and saw-toothed bottom edge to prevent the knob from turning. |
| Category: | Knob |
| Assigned to: |
Patentee Information:
| POLK, Robert H. | Birmingham, AL |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 174 | INSULATORS; With conductor holding means; Insulator structure; |
| 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: | 175 | INSULATORS; With conductor holding means; Insulator structure; Self-retaining; |
Known specimens:
| Number: |
Drawings:
Page 1 |