Patent information:
| Patent: | Utility 8,438 |
| Patented: | October 14, 1851 |
| Applied: | |
| Title: | Improvement in Insulators for Telegraphs |
| Description: | CD 1012 & CD 1014, slotted glass tube mounted in a wooden bracket |
| Category: | Insulator |
| Assigned to: |
Patentee Information:
| YANDELL, John | St. Louis, MO |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 45R | OVERHEAD; Towers, poles or posts; |
| Class: | 144 | WOODWORKING |
| Subclass: | 250.1 | FEEDER OR PRESSER; Sectional roll; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 154 | INSULATORS; Insulator and conductor embracing holder; |
Known specimens:
| Number: | CD 1012 |
| Number: | CD 1014 |
Drawings:
Page 1 |