Patent information:
| Patent: | Utility 123,878 |
| Patented: | February 20, 1872 |
| Applied: | |
| Title: | Improvement in Telegraph Insulators |
| Description: | CD 141.9, four projections to reduce surface contact |
| Category: | Insulator |
| Assigned to: |
Patentee Information:
| EMMINGER, David R. P. | Harrisburg, PA |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 174 | INSULATORS; With conductor holding means; Insulator structure; |
| Class: | 137 | FLUID HANDLING |
| Subclass: | 512.1 | |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 202 | INSULATORS; With terminal elements; Pin type; Screw or bayonet type; |
Known specimens:
| Number: | CD 141.9 |
Drawings:
Page 1 |