Pocket Watch Database
Patent Archive
#1778421
Patent Information
Clock Watch Time Device Balance Wheel Unit
Charles B. Greenberg
October 14, 1930
Patent #1778421
| Patent Number: | 1778421 |
| Description: | Clock Watch Time Device Balance Wheel Unit |
| Inventor(s): | Charles B. Greenberg |
| Patent Date: | Oct 14, 1930 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
