Pocket Watch Database
Patent Archive
#439156
Patent Information
Tool Calipers Balance Wheel
John M. Irmen
October 28, 1890
Patent #439156
| Patent Number: | 439156 |
| Description: | Tool Calipers Balance Wheel |
| Inventor(s): | John M. Irmen |
| Patent Date: | Oct 28, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
