Pocket Watch Database
Patent Archive
#2728188
Patent Information
Balance Wheel And Hair Spring Assembly
Hugo Hettich
December 27, 1955
Patent #2728188
| Patent Number: | 2728188 |
| Description: | Balance Wheel And Hair Spring Assembly |
| Inventor(s): | Hugo Hettich |
| Patent Date: | Dec 27, 1955 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
