Patent information:
| Patent: | Utility 1,668,581 |
| Patented: | May 8, 1928 |
| Applied: | September 24, 1925 |
| Title: | Electrical Insulating Knob |
| Description: | Knob (Canada) |
| Category: | Knob |
| Assigned to: |
Patentee Information:
| BROWN, Donald M. | Prince Rupert, British Columbia, Canada |
Class and subclass information:
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 157 | INSULATORS; Divided insulator; Aligned through aperture; |
| Class: | 174 | ELECTRICITY: CONDUCTORS AND INSULATORS |
| Subclass: | 164 | INSULATORS; With insulator-supporting or attaching means; Support penetrating; |
Known specimens:
| None known |
Drawings:
Page 1 |