Pocket Watch Database
Patent Archive
#2567567
Patent Information
Timepiece Hair Spring
Walter Kohlhagen
September 11, 1951
Patent #2567567
| Patent Number: | 2567567 |
| Description: | Timepiece Hair Spring |
| Inventor(s): | Walter Kohlhagen |
| Assignee: | E Ingraham Co |
| Patent Date: | Sep 11, 1951 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
