Pocket Watch Database
Patent Archive
#389841
Patent Information
Tubular Resonator
John Harrington
September 18, 1888
Patent #389841
| Patent Number: | 389841 |
| Description: | Tubular Resonator |
| Inventor(s): | John Harrington |
| Assignee: | Durfee Walter H |
| Patent Date: | Sep 18, 1888 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
