Pocket Watch Database
Patent Archive
#2057642
Patent Information
Timepiece Hair Spring Assembly
William Barton Eddison
Adam John V. Mc
October 13, 1936
Patent #2057642
| Patent Number: | 2057642 |
| Description: | Timepiece Hair Spring Assembly |
| Inventor(s): |
William Barton Eddison Adam John V. Mc |
| Patent Date: | Oct 13, 1936 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
