Pocket Watch Database
Patent Archive
#230134
Patent Information
Clock Calendar Self Adjust
Isaac W. Johnson
July 20, 1880
Patent #230134
| Patent Number: | 230134 |
| Description: | Clock Calendar Self Adjust |
| Inventor(s): | Isaac W. Johnson |
| Patent Date: | Jul 20, 1880 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
