Patent information:
| Patent: | Utility 878,302 |
| Patented: | February 4, 1908 |
| Applied: | July 10, 1907 |
| Title: | Insulator |
| Description: | nail-knob, square shaped with reversible matching halves |
| Category: | Knob |
| Assigned to: |
Patentee Information:
| MARKEL, Harley R. | Dayton, OH |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 157 | INSULATORS; Divided insulator; Aligned through aperture; |
Known specimens:
| Number: |  |
Drawings:
Page 1 |