Pocket Watch Database
Patent Archive
#421138
Patent Information
Tool Caliper Watch Crystal
Andrew Nylen
February 11, 1890
Patent #421138
| Patent Number: | 421138 |
| Description: | Tool Caliper Watch Crystal |
| Inventor(s): | Andrew Nylen |
| Patent Date: | Feb 11, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
