Pocket Watch Database
Patent Archive
#2457631
Patent Information
Cylindrical Hair Spring Form
William Ogle Jr Bennett
December 28, 1948
Patent #2457631
| Manufacturer: | Hamilton |
| Patent Number: | 2457631 |
| Description: | Cylindrical Hair Spring Form |
| Inventor(s): | William Ogle Jr Bennett |
| Assignee: | Hamilton Watch Co |
| Patent Date: | Dec 28, 1948 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
