Patent information:
| Patent: | Utility 477,980 |
| Patented: | June 28, 1892 |
| Applied: | February 21, 1890 |
| Title: | Insulator |
| Description: | Knob (specimens made by Akron Marble & Toy Mfg. Co.) |
| Category: | Knob |
| Assigned to: | The Thomson-Houston Electric Co. |
Patentee Information:
| WIRT, Herbert C. | Boston, MA |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 166R | INSULATORS; With insulator-supporting or attaching means; Support penetrating; Through aperture, penetrating element clamped; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 174 | INSULATORS; With conductor holding means; Insulator structure; |
Known specimens:
| Number: |  |
Drawings:
Page 1 |