Pocket Watch Database
Patent Archive
#988139
Patent Information
Watch Balance
John A. Petta
March 28, 1911
Patent #988139
| Patent Number: | 988139 |
| Description: | Watch Balance |
| Inventor(s): | John A. Petta |
| Patent Date: | Mar 28, 1911 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
