Pocket Watch Database
Patent Archive
#497422
Patent Information
Clock Key
Friedrich Baum
May 16, 1893
Patent #497422
| Patent Number: | 497422 |
| Description: | Clock Key |
| Inventor(s): | Friedrich Baum |
| Assignee: | Hirschfeld Ferdinand |
| Patent Date: | May 16, 1893 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
