Patent information:
| Patent: | Utility 194,220 |
| Patented: | August 14, 1877 |
| Applied: | May 29, 1877 |
| Title: | Improvement in Lightning Rods and Insulators |
| Description: | CD 317 lightning rod insulator and spiral lightning rod |
| Category: | Insulator |
| Assigned to: | |
Patentee Information:
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 4R | AIR TERMINALS; |
Known specimens:
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Drawings:
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