Patent information:
| Patent: | Utility 434,879 |
| Patented: | August 19, 1890 |
| Applied: | September 13, 1889 |
| Title: | Electric Insulator |
| Description: | CD 144.5 and CD 260, ridges around inner surface of skirt |
| Category: | Insulator |
| Assigned to: |
Patentee Information:
| OAKMAN, Samuel | Melrose, MA |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 211 | INSULATORS; With moisture or dirt removing or shedding; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 202 | INSULATORS; With terminal elements; Pin type; Screw or bayonet type; |
Known specimens:
| Number: | CD 144.5 |
| Number: | CD 260 |
Drawings:
Page 1 |