Pocket Watch Database
Patent Archive
#438672
Patent Information
Watch Hair Spring Collet
William E. Banta
October 21, 1890
Patent #438672
| Patent Number: | 438672 |
| Description: | Watch Hair Spring Collet |
| Inventor(s): | William E. Banta |
| Patent Date: | Oct 21, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
