Pocket Watch Database
Patent Archive
#287448
Patent Information
Mfg Of Hair Spring
John Logan
October 30, 1883
Patent #287448
| Manufacturer: | Waltham |
| Patent Number: | 287448 |
| Description: | Mfg Of Hair Spring |
| Inventor(s): | John Logan |
| Patent Date: | Oct 30, 1883 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
