Pocket Watch Database
Patent Archive
#411444
Patent Information
Tool Micrometer Calipers
John M. Irmen
September 24, 1889
Patent #411444
| Patent Number: | 411444 |
| Description: | Tool Micrometer Calipers |
| Inventor(s): | John M. Irmen |
| Patent Date: | Sep 24, 1889 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
