Pocket Watch Database
Patent Archive
#783621
Patent Information
Timepiece Hair Spring Collet
Frank R. Cunningham
February 28, 1905
Patent #783621
| Patent Number: | 783621 |
| Description: | Timepiece Hair Spring Collet |
| Inventor(s): | Frank R. Cunningham |
| Assignee: | Bigelow Kennard & Co |
| Patent Date: | Feb 28, 1905 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
