Pocket Watch Database
Patent Archive
#437796
Patent Information
Watch Staff Device Drill Hole
William M. Preston
October 7, 1890
Patent #437796
| Patent Number: | 437796 |
| Description: | Watch Staff Device Drill Hole |
| Inventor(s): | William M. Preston |
| Patent Date: | Oct 7, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
