Pocket Watch Database
Patent Archive
#342917
Patent Information
Machine Watch Main Spring
John Logan
June 1, 1886
Patent #342917
Patent Number: | 342917 |
Description: | Machine Watch Main Spring |
Inventor(s): | John Logan |
Patent Date: | Jun 1, 1886 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |