Pocket Watch Database
Patent Archive
#D20317
Patent Information
Tool Knurling
Casper Schaefer
November 18, 1890
Patent #D20317
| Patent Number: | D20317 |
| Description: | Tool Knurling |
| Inventor(s): | Casper Schaefer |
| Assignee: | Watch-case Co |
| Patent Date: | Nov 18, 1890 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
