Patent information:
| Patent: | Utility 201,544 |
| Patented: | March 19, 1878 |
| Applied: | August 7, 1877 |
| Title: | Improvement in Insulators for Telegraph Wires |
| Description: | Threads of segmented internal threads to match segmented pin |
| Category: | Thread |
| Assigned to: |
Patentee Information:
| MATTHEWMAN, Joseph | Brooklyn, NY |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 206 | INSULATORS; With terminal elements; Pin type; Screw or bayonet type; Sockets; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 205 | INSULATORS; With terminal elements; Pin type; Screw or bayonet type; Soft yielding material pin; |
Known specimens:
| None known |
Drawings:
Page 1 |