Patent information:
| Patent: | Design 56,715 |
| Patented: | November 30, 1920 |
| Applied: | May 26, 1919 |
| Title: | Design for a Ball for Lightning Rods and Barn Ventilators |
| Description: | Glass ball with spiralling and intersecting grooves on the surface |
| Category: | Lightning Rod Ornament |
| Assigned to: |
Patentee Information:
| THOMPSON, George E. | Owatonna, MN |
Class and subclass information:
| Class: | D10 | MEASURING, TESTING, OR SIGNALLING INSTRUMENTS (1) (2) |
| Subclass: | 121 | |
| Class: | D10 | MEASURING, TESTING, OR SIGNALLING INSTRUMENTS (1) (2) |
| Subclass: | 105 | |
| Class: | D26 | LIGHTING |
| Subclass: | 129 |
Known specimens:
| None known |
Drawings:
Page 1 |