Pocket Watch Database
Patent Archive
#329916
Patent Information
Watch Balance Apparatus For Test & Grade
John Logan
November 10, 1885
Patent #329916
Patent Number: | 329916 |
Description: | Watch Balance Apparatus For Test & Grade |
Inventor(s): | John Logan |
Patent Date: | Nov 10, 1885 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |