Pocket Watch Database
Patent Archive
#639578
Patent Information
Clock Or Watch Regulator For Hair Spring
Olof Johanson
December 19, 1899
Patent #639578
| Patent Number: | 639578 |
| Category: | Regulators |
| Description: | Clock Or Watch Regulator For Hair Spring |
| Inventor(s): | Olof Johanson |
| Patent Date: | Dec 19, 1899 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
