Pocket Watch Database
Patent Archive
#405437
Patent Information
Clock Speed Indicator
Albert R. Sherman
June 18, 1889
Patent #405437
| Patent Number: | 405437 |
| Description: | Clock Speed Indicator |
| Inventor(s): | Albert R. Sherman |
| Patent Date: | Jun 18, 1889 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
