Pocket Watch Database
Patent Archive
#66798
Patent Information
Tool Spring Crystal Pinion Guage
Charles E. Collins
July 16, 1867
Patent #66798
| Patent Number: | 66798 |
| Description: | Tool Spring Crystal Pinion Guage |
| Inventor(s): | Charles E. Collins |
| Patent Date: | Jul 16, 1867 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
