Pocket Watch Database
Patent Archive
#863725
Patent Information
Clock Work Spring
John S. Kirstein
August 20, 1907
Patent #863725
| Patent Number: | 863725 |
| Description: | Clock Work Spring |
| Inventor(s): | John S. Kirstein |
| Patent Date: | Aug 20, 1907 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
