Patent information:
| Patent: | Utility 129,724 |
| Patented: | July 23, 1872 |
| Applied: | |
| Title: | Improvement in Insulators for Telegraphic Uses |
| Description: | Roughened lower surface of insulator to retain patented coating mixture |
| Category: | Rough |
| Assigned to: | |
Patentee Information:
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: | 209 | INSULATORS; Sectional, multi-part, composite, or coated; |
Known specimens:
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