Pocket Watch Database
Patent Archive
#2291455
Patent Information
Method Of Make Balance Wheel
Arthur P. Emmert
Pierre Dumaine
July 28, 1942
Patent #2291455
| Manufacturer: | Waltham |
| Patent Number: | 2291455 |
| Description: | Method Of Make Balance Wheel |
| Inventor(s): |
Arthur P. Emmert Pierre Dumaine |
| Assignee: | Waltham Watch Co |
| Patent Date: | Jul 28, 1942 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
