Pocket Watch Database
Patent Archive
#443256
Patent Information
Watch Balance Hair Spring Make
John Logan
December 23, 1890
Patent #443256
| Patent Number: | 443256 |
| Description: | Watch Balance Hair Spring Make |
| Inventor(s): | John Logan |
| Patent Date: | Dec 23, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
