Pocket Watch Database
Patent Archive
#228995
Patent Information
Attach Of Hair Spring To Balance Staff
James Milton Heard
June 22, 1880
Patent #228995
| Patent Number: | 228995 |
| Description: | Attach Of Hair Spring To Balance Staff |
| Inventor(s): | James Milton Heard |
| Patent Date: | Jun 22, 1880 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
