Pocket Watch Database
Patent Archive
#412631
Patent Information
Tool Watch Crystal Gage
Oscar C. Kraehmer
October 8, 1889
Patent #412631
| Patent Number: | 412631 |
| Description: | Tool Watch Crystal Gage |
| Inventor(s): | Oscar C. Kraehmer |
| Patent Date: | Oct 8, 1889 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
