Pocket Watch Database
Patent Archive
#920173
Patent Information
Time Stamp
Charles S. Perry
May 4, 1909
Patent #920173
| Patent Number: | 920173 |
| Description: | Time Stamp |
| Inventor(s): | Charles S. Perry |
| Assignee: | Stromberg Electric Mfg Co |
| Patent Date: | May 4, 1909 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
